That's probably it. Although I had considered that possibility earlier, I didn't have a Ritmo stamp in my archives to use for reference. But I do now.
So far it's the closet match we've come up with. I'm going to take some better photos of this thing when it arrives. I'd be interested to know if it's a B20 cymbal or one of their lower line / intermediate cymbals. I once played a Ritmo with a "block logo" shall we say. I wasn't impressed. A nice dry ride, but definitely not B20. Since that day I just assumed all Ritmo cymbals were B15 or B12 or something. I'm just learning today that there were a bunch of these different RITMO stamps. I'll report back with more info regarding quality, weight etc.