Very nice machine! Until you can find a cap, you can play "laundromat" LOL (those that remember these in Laundromats remember that the agitators there did not have caps (at least that I ever saw).
If it's a 63, it's a different (plastic cap) than the previous models. I think it may be, since the top part of the agitator looks a little different to me.
So happy to hear it's working as well as it looks! Was this in someone's summer home perhaps? It just looks so pristine.