I know a lot of people get hung up on hand hammered (or not) but I've found far more important is the behavior of the cymbal. If it has a good edge wobble, chances are I'm gonna like it.
I bought a 20 that's all beat to snot and cracked and it sounds amazing. It has a slight edge wobble.
My mid-50's 22 (large block stamp) has the edge wobble. I had that worked over by Justin and he described it as "a perfect 22" crash". Well, it's perfect now that he tweaked it.
I have an EAK that I lucked into. That thing has the wobble and sounds amazing. Those happened to be hand hammered (the early ones with the "K" on the bottom rather than "Zildjian" and the cymbal ID printed upside down compared to A Zildjians. A fairly narrow band, maybe up to 1981 or so- the very first ones with Tony Williams pushing them. Soon after they had the usual Zildjian ink on the bottom and finally the ID went right side up. For sure they were machine hammered by then.
Modern cymbals are tough. I found some K custom dark 13" hats used (abused) and was so impressed I sought out more from that line. I have a 20" ride and an 18" crash. They don't have the wobble and the 20" ride sits in the bag (or is a second ride to the old 22). I tried the 16" crash and it's horrible. I think the 19 will be good but if I were to buy another new Zildjian it would be a new K (Kerope series I guess?) very thin and Bendy. Most of the ones I e tried have the edge wobble. I believe they heat treat them (also called ageing for aerospace parts) and they look older than they are. These are sweet but I always keep my eyes out for the first-gen EAK's because those seem to be really special.