Olympus OM2 in 3 minutes (including design flaw)

The amazing Olympus OM2, introduced in 1975. Here's a link to the MIR website giving more information:
https://www.mir.com.my/rb/photography/hardwares/classics/olympusom1n2/om2/index.htm

In the video, I mentioned the design issue with the foam in the pentaprism. Here's the link shown:
o http://olympus.dementix.org/Hardware/tutorials/FoamRemoval/index.html

This is the link to the video on the OM2SP, which superceded the OM2 in 1984:
https://www.youtube.com/watch?v=FZXSlvO4Yts&t=1s

Видео Olympus OM2 in 3 minutes (including design flaw) канала Three Minute Pro