Your 1820 is in very nice shape and is virtually identical to my 1820. I can't speak highly enough of this model, it's the go-to pond-water scope.
I see you have the 1825 mechanical stage; this is relatively rare, considering how many I've ever seen on ebay. I painted mine flat black to match the stage, looks a little better. If you don't know already, it can be moved on the stage to the other side (or corner) easily. Also, keep in mind that the hole in the top (about 1" back from the front edge of the blue top) holds one of the expanding-mandrel types of AO illuminators, in case you get tired of those new-fangled LED lights I see.
You have a black Bertrand lens attachment, I have a grey one; another thing to paint, I guess.
One more thing: the stage holds the 6-well plastic culture plates nicely. I've had viable pond samples last for months in mine, topping off the H2O w/ more pond water every day (of course, the populations change somewhat!)
Great images, we look forward to more.
This probably isn't at present of that much interest to you, Kurt; maybe in the future but since you have an array of D.I.N. objectives, Bill. Did you ever investigate the possibilities of using those on the 1820? I'm not sure how high the stage can go? There are some inexpensive glass bottom confocal cell culture dishes available now( 25.00 instead of 350.00), with nominal .17 cover glass bottoms. Even if the stage can't raise the extra mm required, there are also those two 10X and 40X planapos they made with 34mm parfocal distance.
A cover glass bottom dish wouldn't be that hard to make anyway. just a thought.