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.
No, but it is styled to match a Tappan microwave, they probably did this, so you could have a regular gas oven like this and a microwave in the same kitchen.
Odd though having that metal screening on a regular oven which is going to filter the view noticeably. Considering putting windows in oven doors and touting them wasn't that old.