I also want to add that I believe there are profile and hammering differences between designations like "THIN" and "THIN CRASH" even if the models names are similar or "MEDIUM RIDE" and "HEAVY" even if they might be close in weight.
I have a pre-serial 22" "MEDIUM" at 2760g and an inkless 22" at 2830g and they are very different cymbals. The inkless has a higher profile, smaller hammer strikes, different bell, and is much pingier. I suspect it's a "MEDIUM RIDE". I'll need to buy lots of vintage 602's to complete my 'research'. I bought a reissue 24" "MEDIUM RIDE" (just shy of 4000g) last year, and a darn-near NOS pre-serial 24" "MEDIUM" last week (a light coat of dust away from 3500g).
JEEZ WIFE I'M ONLY BUYING THESE CYMBALS BECAUSE OF MY LOVE OF SCIENCE. WHY ARE YOU HOLDING UP THE ADVANCEMENT OF KNOWLEDGE?