Ladies Oyster Perpetual 6504 Info

[klgtcraig]

I was recently given an Oyster Perpetual as a gift from a dear family friend. In examining it and trying to identify it, the model number engraved is BREVET+ 6504. The inside band area is engraved 750, then the Rolex logo (but it is a smooth oval, not a scrolled one), SWISS MADE, and 3 small numbers that appear to be 1 56....(which I understand is the first quarter of 1956). I did find some info online that showed an authentic Rolex with a smooth oval logo, not a scrolled one. But I can't find any bands that match this one. Can anyone give me information, etc.? As my first Rolex, it is absolutely beautiful. The attached photo of the clasp may look like it is marred/scratched, but it isn't. The entire watch is in excellent appearance. Photos attached...Thanks for any info, etc.