Search found 38 matches

by jayjay
Tue Dec 12, 2023 9:49 am
Forum: Collecting microscopes and slides
Topic: Olympus serial number timeline
Replies: 35
Views: 33054

Re: Olympus serial number timeline

Olympus serial number timeline Models 10X & 40X objectives_121223.JPG
Olympus serial number timeline Models 10X & 40X objectives_121223.JPG (125.93 KiB) Viewed 2125 times
Olympus serial number timeline Models 4X & 100X objectives_121223.JPG
Olympus serial number timeline Models 4X & 100X objectives_121223.JPG (115.55 KiB) Viewed 2123 times
Olympus serial number timeline Models 20X & 60X objectives_121223.JPG
Olympus serial number timeline Models 20X & 60X objectives_121223.JPG (91.87 KiB) Viewed 2125 times
by jayjay
Tue Dec 12, 2023 9:48 am
Forum: Collecting microscopes and slides
Topic: Olympus serial number timeline
Replies: 35
Views: 33054

Re: Olympus serial number timeline

Olympus serial number timeline Models SZ JM & X_121223.JPG Olympus serial number timeline Models H & VB_121223.JPG Olympus serial number timeline Models FHF & MF_121223.JPG Olympus serial number timeline Models V VK & VA VT_121223.JPG Olympus serial number timeline Models PM6 PM7 &a...
by jayjay
Tue Dec 12, 2023 9:47 am
Forum: Collecting microscopes and slides
Topic: Olympus serial number timeline
Replies: 35
Views: 33054

Re: Olympus serial number timeline

Update with 50 new data points, a couple of new models and some reorganisation. Olympus serial number timeline Mixed models pre post 1954_121223.JPG Olympus serial number timeline Model ST HS_121223.JPG Olympus serial number timeline Models G & E_121223.JPG Olympus serial number timeline Models ...
by jayjay
Tue Oct 10, 2023 12:11 am
Forum: Collecting microscopes and slides
Topic: Olympus serial number timeline
Replies: 35
Views: 33054

Re: Olympus serial number timeline

Thanks Pete - I hope the timelines are proving useful to readers, they have helped me date my collection. Plus I enjoy watching the timelines develop.
I have more data on old objectives (pre-1953) and different objective types that I'll post once I receive more information.
by jayjay
Mon Oct 09, 2023 6:58 am
Forum: Collecting microscopes and slides
Topic: Olympus serial number timeline
Replies: 35
Views: 33054

Re: Olympus serial number timeline

Olympus serial number timeline Mixed models F MF H & PM camera adapter_091023.JPG
Olympus serial number timeline Mixed models F MF H & PM camera adapter_091023.JPG (89.24 KiB) Viewed 2759 times
Olympus serial number timeline 10X 40X 100X objectives_091023.JPG
Olympus serial number timeline 10X 40X 100X objectives_091023.JPG (118.38 KiB) Viewed 2759 times
Olympus serial number timeline 4X 20X 60X objectives_091023.JPG
Olympus serial number timeline 4X 20X 60X objectives_091023.JPG (91.18 KiB) Viewed 2759 times
by jayjay
Mon Oct 09, 2023 6:50 am
Forum: Collecting microscopes and slides
Topic: Olympus serial number timeline
Replies: 35
Views: 33054

Re: Olympus serial number timeline

Latest update with 60 additional data points Olympus serial number timeline Pre 1954 and mixed models_091023.JPG Olympus serial number timeline Model G & ST HS_091023.JPG Olympus serial number timeline Model E & bi tri heads_091023.JPG Olympus serial number timeline Models K & SZ JM_0910...
by jayjay
Wed Jun 14, 2023 10:09 am
Forum: Collecting microscopes and slides
Topic: Olympus serial number timeline
Replies: 35
Views: 33054

Re: Olympus serial number timeline

Model X-Tr stereomicroscope and objectives 4X, 20X & 60X added. 4X objective appears split into two serial number groupings: >400,000 and <400,000 Olympus serial number timeline Mixed models V & X_140623.JPG Olympus serial number timeline Mixed models F MF H & PM camera adapter_140623.JPG Ol...
by jayjay
Wed Jun 14, 2023 10:07 am
Forum: Collecting microscopes and slides
Topic: Olympus serial number timeline
Replies: 35
Views: 33054

Re: Olympus serial number timeline

Data is coming in very slowly - update with 50 new data points spread across all models Olympus serial number timeline Pre 1954 and mixed models_140623.JPG Olympus serial number timeline Model G & ST HS_140623.JPG Olympus serial number timeline Model E & bi tri heads_140623.JPG Olympus seria...
by jayjay
Tue Mar 21, 2023 10:02 am
Forum: Collecting microscopes and slides
Topic: Olympus serial number timeline
Replies: 35
Views: 33054

Re: Olympus serial number timeline

I've finally found time to sort through some of the data I have for objectives. As with the microscope chief bodies and heads, the data suggests the objective serial numbers were reset to start from 200000 in mid-1954. Olympus serial number timeline 10X objectives_200323.JPG Olympus serial number ti...
by jayjay
Sun Feb 05, 2023 10:51 pm
Forum: Collecting microscopes and slides
Topic: Olympus serial number timeline
Replies: 35
Views: 33054

Re: Olympus serial number timeline

I've combined the different V models I have data for. There's evidently a couple of different serial number sequences. More data will help clarify relationships within the dataset.
Olympus serial number timeline Mixed models V_060223.JPG
Olympus serial number timeline Mixed models V_060223.JPG (32 KiB) Viewed 22966 times
by jayjay
Sun Feb 05, 2023 10:48 pm
Forum: Collecting microscopes and slides
Topic: Olympus serial number timeline
Replies: 35
Views: 33054

Re: Olympus serial number timeline

10 new data points and some improvements to layout. It appears the trinocular heads for models E, F & MF follow the same sequence. Olympus serial number timeline Model E & bi tri heads_060223.JPG Olympus serial number timeline Model G & ST HS_060223.JPG Olympus serial number timeline Pre 195...
by jayjay
Mon Jan 23, 2023 5:48 am
Forum: Collecting microscopes and slides
Topic: Olympus serial number timeline
Replies: 35
Views: 33054

Re: Olympus serial number timeline

Update with 47 new data points and some models separated to aid with readability Olympus serial number timeline Mixed models pre-1954_230123.jpg Olympus serial number timeline Mixed models_230123.jpg Olympus serial number timeline Models E G STHS_230123.jpg Olympus serial number timeline Models K SZ...
by jayjay
Wed Nov 23, 2022 5:46 am
Forum: Collecting microscopes and slides
Topic: Olympus serial number timeline
Replies: 35
Views: 33054

Re: Olympus serial number timeline

New information is only trickling in at present, so please contact me if you can add to the dataset. There's a few updates to each of the graphs. Olympus serial number timeline Mixed models pre-1954_231122.jpg Olympus serial number timeline Mixed models_231122.jpg Olympus serial number timeline Mode...
by jayjay
Wed Oct 12, 2022 9:25 am
Forum: Collecting microscopes and slides
Topic: Olympus serial number timeline
Replies: 35
Views: 33054

Re: Olympus serial number timeline

Latest update. I've combined JM with SZ as both models use the same head. Olympus serial number timeline Mixed models pre-1954_121022.jpg Olympus serial number timeline Models E G STHS_121022.jpg Olympus serial number timeline Models K SZJM PM6_121022.jpg Olympus serial number timeline Mixed models_...
by jayjay
Tue Sep 27, 2022 5:44 am
Forum: Collecting microscopes and slides
Topic: Olympus serial number timeline
Replies: 35
Views: 33054

Re: Olympus serial number timeline

Some more pre-1954 units have surfaced, plus there's a couple of additions to post-1954 timelines:
Olympus model timelines pre-1954_270922.JPG
Olympus model timelines pre-1954_270922.JPG (52.35 KiB) Viewed 25456 times
Olympus serial number timelines_270922.jpg
Olympus serial number timelines_270922.jpg (151.9 KiB) Viewed 25456 times
Olympus serial number timelines - mixed models_270922.JPG
Olympus serial number timelines - mixed models_270922.JPG (68.9 KiB) Viewed 25456 times
by jayjay
Fri Sep 16, 2022 1:30 am
Forum: Collecting microscopes and slides
Topic: Olympus serial number timeline
Replies: 35
Views: 33054

Re: Olympus serial number timeline

Update
Olympus model timelines pre-1954_140822.JPG
Olympus model timelines pre-1954_140822.JPG (29.93 KiB) Viewed 25836 times
Olympus serial number timelines_160922.jpg
Olympus serial number timelines_160922.jpg (151.76 KiB) Viewed 25836 times
Olympus serial number timelines - mixed models_160922.JPG
Olympus serial number timelines - mixed models_160922.JPG (61.19 KiB) Viewed 25836 times
by jayjay
Tue Sep 06, 2022 11:05 am
Forum: Collecting microscopes and slides
Topic: Olympus serial number timeline
Replies: 35
Views: 33054

Re: Olympus serial number timeline

A few additions:
Olympus model timelines pre-1954_140822.JPG
Olympus model timelines pre-1954_140822.JPG (29.93 KiB) Viewed 26243 times
Olympus serial number timelines_060922.jpg
Olympus serial number timelines_060922.jpg (149.27 KiB) Viewed 26243 times
Olympus serial number timelines - mixed models_060922.JPG
Olympus serial number timelines - mixed models_060922.JPG (59.43 KiB) Viewed 26243 times
by jayjay
Sun Aug 28, 2022 10:30 am
Forum: Collecting microscopes and slides
Topic: Olympus serial number timeline
Replies: 35
Views: 33054

Re: Olympus serial number timeline

New models and data points have been added to the mixed model graph and a labelling mistake to Homare UCE rectified. I've decided to separate serial numbers below 200000 and pool the models into one graph for now - I've only received data for five of these to date and removing them makes reading the...
by jayjay
Sun Aug 14, 2022 10:33 am
Forum: Collecting microscopes and slides
Topic: Olympus serial number timeline
Replies: 35
Views: 33054

Re: Olympus serial number timeline

A few additions:
Olympus model timelines_140822.JPG
Olympus model timelines_140822.JPG (143.69 KiB) Viewed 27174 times
by jayjay
Tue Aug 02, 2022 11:03 am
Forum: Collecting microscopes and slides
Topic: Olympus serial number timeline
Replies: 35
Views: 33054

Re: Olympus serial number timeline

The other thing the combined dataset shows is that the various student ST and HS versions can be grouped into one timeline as follows.
Olympus model timelines_020822.JPG
Olympus model timelines_020822.JPG (137.02 KiB) Viewed 27434 times
by jayjay
Tue Aug 02, 2022 10:44 am
Forum: Collecting microscopes and slides
Topic: Olympus serial number timeline
Replies: 35
Views: 33054

Re: Olympus serial number timeline

I've played around with the data received so far and I think I've found something interesting. Since the early 1950s, there are no serial numbers below 200000, even for models that were released in the 60s and 70s and for which I have a decent number of data points. This suggests to me that sometime...
by jayjay
Sun Jul 31, 2022 4:25 am
Forum: Collecting microscopes and slides
Topic: Olympus serial number timeline
Replies: 35
Views: 33054

Re: Olympus serial number timeline

A few additions plus hopefully a slightly more readable format.
Olympus model timelines_310722.JPG
Olympus model timelines_310722.JPG (109.4 KiB) Viewed 27546 times
by jayjay
Sun Jul 17, 2022 11:28 am
Forum: Collecting microscopes and slides
Topic: Olympus serial number timeline
Replies: 35
Views: 33054

Re: Olympus serial number timeline

A decent number of additional data points:
Olympus serial number timeline_170722.jpg
Olympus serial number timeline_170722.jpg (95.93 KiB) Viewed 27772 times
by jayjay
Tue Jul 12, 2022 3:24 am
Forum: Collecting microscopes and slides
Topic: Olympus serial number timeline
Replies: 35
Views: 33054

Re: Olympus serial number timeline

Model POM added
Olympus serial number timeline_120722.jpg
Olympus serial number timeline_120722.jpg (98.38 KiB) Viewed 27889 times
by jayjay
Wed Jun 29, 2022 8:58 pm
Forum: Collecting microscopes and slides
Topic: Olympus serial number timeline
Replies: 35
Views: 33054

Re: Olympus serial number timeline

Hi all,
I appreciate the details of the plots are not easy to see. If anyone wants an approximate date of manufacture of one the models listed, then you’re welcome to send me your model and serial number and I’ll let you know which known dates it fits between.
by jayjay
Tue Jun 28, 2022 2:56 am
Forum: Collecting microscopes and slides
Topic: Olympus serial number timeline
Replies: 35
Views: 33054

Re: Olympus serial number timeline

I am very grateful to have been informed that Olympus Inspection Certificates written in Japanese used the traditional Japanese calendar year system, not the Western calendar year. The traditional Japanese calendar is based on how many years each emperor has reigned since beginning their rule, with ...
by jayjay
Mon Jun 27, 2022 3:38 am
Forum: Collecting microscopes and slides
Topic: Olympus serial number timeline
Replies: 35
Views: 33054

Re: Olympus serial number timeline

More models and data points - thanks to all who have provided certificate info.
Olympus serial number timeline_270622.jpg
Olympus serial number timeline_270622.jpg (87.92 KiB) Viewed 28272 times
by jayjay
Mon Jun 06, 2022 10:16 am
Forum: Collecting microscopes and slides
Topic: Olympus serial number timeline
Replies: 35
Views: 33054

Re: Olympus serial number timeline

A few more data points...
Olympus serial number timeline_060622.jpg
Olympus serial number timeline_060622.jpg (87.85 KiB) Viewed 28518 times
by jayjay
Tue May 03, 2022 3:32 am
Forum: Collecting microscopes and slides
Topic: Olympus serial number timeline
Replies: 35
Views: 33054

Re: Olympus serial number timeline

Some more plus an edit to Model E bino
Olympus serial number timeline_030522.jpg
Olympus serial number timeline_030522.jpg (85.28 KiB) Viewed 29062 times
by jayjay
Wed Apr 20, 2022 2:16 am
Forum: Collecting microscopes and slides
Topic: Olympus serial number timeline
Replies: 35
Views: 33054

Re: Olympus serial number timeline

A few additions, plus I've further sub-divided some models
Olympus timeline_200422.JPG
Olympus timeline_200422.JPG (108.99 KiB) Viewed 29245 times