18" Pre Serial Paiste Formula 602 that weighs about 1770 grams, so it is likely a "Medium" although it likely never had ink designation (no ink) and "Medium" was Paiste's term for the cymbal between the crash and the ride. This has rivet holes but no rivets installed. I imagine the holes are not factory but they look good to me. Center hole is good and no cracks anywhere. Any edge denting is practically minimal and the edge roughness is all very mild with the exception of the nick shown in pic 5 (which is still not terrible). There's patina and scratches and stickmarks and discoloration. OPINION ON SOUND - great as a crash or a ride. Has that pre serial 602 shimmer that's bright but not super "musical note-ish" (meaning there's not a ton of "blang" or "bling" but rather more "SHHHHHHAAAHHHH." A pretty loud cymbal but not a total ear-buster.