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.
For me, it depends on the amount of watches in the collection. Milsubs are great, but they would not be my first option; they would make a great addition to any collection as a 4th or 5th option, IMHO.