Fun post...I learned EM on a similar model, 1970's vintage...that brings back memories! Overnight stay overs in the lab to meet a deadline, darkroom development, ahh those were the days.
I, too, have been wanting to write a post about an instrument I knew and loved. It was a Beckman Model E analytical ultracentrifuge, serial number 13 made in 1963 working perfectly in the 1980's!
It allowed the operator to observe the samples and take photographs during centrifugation.

https://digital.sciencehistory.org/works/wm117p37c