It looks like a bike that was hardly ridden, so you should get many miles out of it. It has a SA hub, which is better than the Shimano 3 speed hub a lot of them had in the early 70's. But the shifter looks like a Shimano shifter. Maybe the rear wheel was changed out. They use different cables. The hub and sticker on the frame show it to be early 70's, most probably 1972. It has the Rollfast chain wheel and chain guard, so that's the manufacturer, Snyder made Rollfast.