The first run of Regular NICA Tantos had BG-42 steel, and were a limited run of 400
The second run of Regular NICA Tantos were S30V steel, and were a limited run of 200
You will rarely see them, but when you do, they will have "limited 200" or "limited 400" on the handle
There was a 21 Sebenza Tanto as well, but I prefer the regulars
Here's my large, I have passed on a few smalls as they are hard to come by NIB: