Me again!
I had to think about this one
Some decades are easier than others
You then have the fantasy collection or something more obtainable so : (I have also gone back to the 30s because I am sad) cheaper 1st fantasy 2nd
30s Moeris ATP or Ebel ATP
40s Record WWW or JLC WWW
50s Lemania HS9 chronograph, Omega 53 or Rolex A/6538
60s Hamilton 6B / Smiths 6B or Seamaster 300 / Lemania double button chrono
70s Hamilton 6BB / lost navigator 6BB or Rolex double stamped 5513/5517 (Lemania diver supervisors watch is an alternative - 70s was a good decade for MOD watches)
80s Precista 6BB or CWC diver 1980
90s Seiko gen2 or Seiko gen1
00s gshock or the citizen eco drive diver
Ok so I have just listed my owned / wanted list as opposed to answering your question…