Learning about watches, vintage or rep, is a terrific jaunt down a rabbit hole. Before joining this forum, I thought I knew a lot about vintage Rolex and rep; I know nothing compared to some gents here ... I am Jon Snow.
@Nanuq when is it best to consider a Rolex from that era has special ordered to answer when things look "off". There have been several watches thought to be incorrect and ended up being a special order or error from the Rolex factory.