My guess is it's probably no older than a 1965. It's a post swing-out shelving model.
I wonder if it works. With some serious elbow grease and car cleaner/wax, the original white exterior could be restored and it would be a really nice fridge. That hit it took at top center could be touched up to make it disappear (or nearly) from most angles. I think the reflection makes it look like a huge dent and much worse than it really is.