Vintage Magnavox

[cdmarion]

I picked this one up today from Craigslist for $40. It's all there and I was told that the sound works but no picture. All I know is that it is a Magnavox model MV32C-1.

I have two questions;

1. Does anyone know what year this was made?

2. There are two switches on the back, one at the antenna and the second under the HV cover. Can someone tell me what these are for?

Thanks