Richard J Kinch wrote:

Can anyone help identify this electronics connector? This is on a medical
instrument (Topcon retinal camera, model TRC-50EX) from the 1990s:

http://www.truetex.com/mystery_connector.htm

I thought it was some custom item, but then I saw something similar to the
female side on a Motorola walkie-talkie recently.

I'm pretty sure it's similarity to other connectors isn't going to help
you here. That is most likely a custom connector, even if it is a
standardized style.