Your call is very important to us

I got my model 500 desk set! It's sweet. Probably a 70s or 80s vintage -- it has a rotary dial, but also the modular connector. Best of all, I have discovered that I can actually make outgoing calls with it. For some reason I had thought that perhaps the lines wouldn't accept pulse dialing, but I'm happy to say I was wrong.

Next mission, a wall phone, model 554.