I will try one more time.
All American Optical, Cambridge Instruments, Reichert or Leica infinity corrected microscopes that were made in the Buffalo factory had retractable nosepieces, a design allowing the stage to remain stationary. Other microscope companies are now adopting it.
All objectives marked with an infinity symbol, made for the above brands of microscopes have fixed noses and do not retract.
The manufacture of microscope components is most practical when accomplished in batch runs and also most practical when costs are as low as possible. AO bought C.Reichert in 1962. Austria had a miserable economy then, having been drained by the Soviets since the second W.W. It therefore had very low production costs but a capable work force. Occasional batches of objectives, designed in Buffalo and usually made in Buffalo, were turned out in the Austrian plant. When Reichert, Austria began converting over from 160mm to infinity correctionin the 70's, some of their production models utilized the 34mm parfocal infinity corrected optical designs from AO. However, the Austrian models were engineered with conventional focusing of the stage, so those objective barrels incorporated spring loading and had a different shape to them. in at least two instances, AO had some objectives done in Austria, rather than Buffalo. It was probably about the time that their Buffalo production had turned to the second generation of planachros(1029, 1309 and 1311) in the early 80's and Austria was still making the older 1023 and 1024 , in the spring loaded format. To fill stock for parts and replacements, AO had a certain number of the Austrian spring loaded type barrels or completed objectives shipped over.
However, that entry on Neeley's site was based on looking at a picture of an objective, not having one in hand, so the assumption that it is spring loaded, although logical is incorrect. There were two such objective designs stocked in Buffalo, that came out of Austria : a 1023 and a 1024 and I have examined both types. Both , look like they are spring loaded but when they were made for the American instruments, the barrel was modified with a spacer, so as to render them as fixed nose objectives.
It would not matter anyway. Whether an objective is spring loaded or fixed, has no effect on focusing. Your objective is Euchred. Just buy another one but it would be best to get a 1029, 1129 or 1311. They are more recent designs and each has qualities that put it above the 1024. Better still, look for a 1014 with iris diaphragm. There is one selling out of Florida right now for not too much.
Thank you very much to be back again.
As usual, very good advice... clear like a crystal (not as my 100X AO objective, though), the text mislead me. Good historical lesson.