Phil,
Paul gave it to me as it wouldn't heat anymore. I was able to fix it, I'm not even sure how! I think one of the microswitches were dirty! I did buy a spare magnetron for it just in case that was the problem but it wasn't!
I spent some time detailing it at the same time but it wasn't in bad condition at all!
Among all the microwave I have, this one is one of a few that's not an Amana-based model (I do have one Panasonic, another Litton rebadge as a "Speed Queen" and 3 GE/Hotpoint in addition of the Amana and GM Frigidaire ovens). It has to be my favorite for it's style.
While it's a bit less powerful than my old Amanas, I have to say this one doesn't seem to leak any radiation measured with my cheap meter! Most others do leak some, even newer (less than 10 years old) microwave ovens that I tested!
As for the production date being in 1971, I am not 100% sure about it but I doubt it could have been made before October of 1970.
I don't remember if I saw a date code when I opened it. I think I based my assumptions on the sticker below that relates to regulation number in the quoted text from this link:
http://www.gao.gov/assets/130/124884.pdf
"On October 6, 1970, FDA publiched in the Federal
Register a final regulation (42 C.F.R. 78.212 (1971)) setting
forth a performance standard for microwave ovens. The
regulation applies to ovens which operate in the freauency
range of 890 to 6,000 MHz and which are used in homes,
commercial establishments, and interstate carriers. The
standard provides that no oven manufactured after October 6,
1971, shall emit a level of radiation in excess of 1 mW/cm2"
