While it is a long way from the beaten path of most members here, the Collins Aerospace Museum in Cedar Rapids, Iowa, U.S.A. is well worth a visit. I went there recently and it has a fascinating collection of equipment going back to the early days of the Collins Radio Company in the early 1930's.
The website is at
https://collinsaerospacemuseum.org/
I strongly suggest that people who are not Rockwell Collins employees register in advance.