Nikon xxxPhot Microscope Slide Holder
This is a remix of drjekyll2k's Zeiss slide holder
https://www.thingiverse.com/thing:243580
I moved the screw slots to fit the standard stage on my Optiphot, which should be the same as a Labophot and probably other Nikon scopes of that era. I also added cutouts to keep the Vernier scales on the rail visible.
The extras here are a shim (if you need to raise the stage above the rail) and a slide-sized tray for random nontransparent stuff.
The rail uses 3mm M3 screws. 8mm length is probably about right (the ones shown are 12mm - too long unless you add washers or a collar). These are button head but a stainless socket cap head would be better.
My working file is on T1nkerc@d (you'll have to search - links blocked it appears).