Rich, yes, that's an early/mid 70's pair. My mom's washer was a more expensive model but had a similar control panel. The green rectangular cycle selections were more of a rust color on my mom's machine. Best machine she ever owned, it lasted 25 years before she made the wrong decision to replace it rather than fix it. With the help of a service guy, I'm sure. I was out of the country at the time or I'm sure she would have consulted with me first.
The $350 price seems very outlandish, but if these are mint or nearly so, that's cheap for a pair of machines that will outlast anything on the market today.