Very lovely Joe Morello tribute kit you have there, Gvdadrummasum. If I wanted to get a set of the period correct cymbals for that kit I'd go for a set of Small Stamp (Late 50s) cymbals. The real deal. Not that I don't love Joe's 602s as well.
The "new" Avedis line of A Zildjians would be about the right sound you would want to replicate Joe's sound from the "Time Out" era. He used A's then and they were not only large, but on the thin side......the Avedis ones would be perfect in this respect. Joe played 14" "medium" hi-hats, a 19" "medium-thin" crash ride, and a 21" "medium" ride at the time.....although the cymbal that is to be purported as THE ONE, is claimed to be closer to a 20" in size than a 21"......its somewhere in between actually. Remember, what we call medium today is rather heavy compared to the late 1950's, so the terms I used in quotes are rather arbitrary.
I'm curious where you got your information about Joe playing a 21". I've heard the claim before but I've never seen any source for the information. I would love to know more. I'm both a fan of 21" cymbals and Joe's playing.
Here is what is supposed to be THE ONE according to Memphis Drum Shop:
[ame="https://www.youtube.com/watch?v=wk_Th7vmLtY"]Joe Morello - The "Take Five" Cymbal Documentary - YouTube[/ame]
Late 50s Small Stamp (SSB), 20 1/8" (55 cm), 2192g. And yes, of the cymbals I've studied there are more slightly oversized ones from the late 50s (Small Stamp) era. Going back into the 40s the diameters aren't as accurate and tend towards being slightly undersized.
Yes, there is a shift in weights which I've documented
[img]http://black.net.nz/avedis/images/A20-weights-by-era.png[/img]
The 2013 reset of the A series brought weights back down, and there are some in that M (for Modern) era category. The A Avedis Series are lighter than the 2013 reset of the A Series. Interestingly the A Zildjian & Cie series did a good job of targeting the Trans Stamp period. In contrast to the tightly focused A Zildjian & Cie weight range, the A Avedis are more variable but still in that heavier Trans Stamp/lighter Small Stamp sweet zone. Here is the published range for the A Avedis 20" cymbals (thanks to Paul Francis). The other coordinate is price and here we're comparing the used prices of vintage cymbals with the Minimum Advertised Price (MAP) for A Avedis cymbals.
[img]http://black.net.nz/avedis/images/20-A-Avedis-update.png[/img]
I've got weights for a MEDIUM RIDE from the 80s which are in the portly 2430g-2600g range compared to a late 50s MEDIUM RIDE which is more like Joe's. There were also MEDIUM, MEDIUM THIN and MEDIUM BOUNCE and BOP models floating around. I'm still working on collecting examples with the model and weight class ink still intact, plus the associated weights. Of course it's about the sound not the weight, but the information on weights and models helps inform our discussion.