That's really interesting about the thermostat knob having a push-pull action. Mine is a little different and that knob is just a simple rotating knob. I would bet it has to do with Defrost, though. Mine has a dedicated Defrost lever which interacts with the mechanism of the control. Yours doesn't seem to have that so it makes sense that the control knob would have this function built in.
As for the gasket; I have found some really effective gaskets at Lowe's. I'm scanning over a ridiculous amount of messages from being sort of offline for about 3 months; so forgive me if you already mentioned this.
They have white, brown, and black in different styles. https://www.lowes.com/pd/M-D-17-ft-x-5-16-in-White-Window-Seal-Rubber-Window-Weatherstrip/1010041
The square style white looks pretty "factory" on the 30's belt-drive Frigidaires, I must say. The "D" section ones work great on the GE Monitor Top cabinets too.
As for the gasket; I have found some really effective gaskets at Lowe's. I'm scanning over a ridiculous amount of messages from being sort of offline for about 3 months; so forgive me if you already mentioned this.
They have white, brown, and black in different styles. https://www.lowes.com/pd/M-D-17-ft-x-5-16-in-White-Window-Seal-Rubber-Window-Weatherstrip/1010041
The square style white looks pretty "factory" on the 30's belt-drive Frigidaires, I must say. The "D" section ones work great on the GE Monitor Top cabinets too.