Hey All --- 50 years ago I was photographer for the Geology Dept at University College London, Gower Street and (PENTAX PLUG) I introduced the Asahi Pentax S1a +Pentax Copy Stand + 50mm f4 Macro-Takumar -- I also had to photograph a Microscope Slide sent from NASA containing some of the Moon Dust that Neil Armstrong put into hos pocket -- I did a Video about it which you can see here :
https://www.youtube.com/watch?v=rKnaGQxSsUo