Saw this on FB marketplace for $50 cdn and noticed the screen behind the window. It's hard to decipher the dial markings and it appears a second knob was not part of this model. The only Tappan wall oven microwaves I've ever seen are the older style from the late 50s but this looks mid 60s.
https://www.facebook.com/marketplac...wse_serp:420b84f6-91d4-4cc4-a751-fe13ab76fc93

https://www.facebook.com/marketplac...wse_serp:420b84f6-91d4-4cc4-a751-fe13ab76fc93
