I'm not an expert, but I would assume so, because the product code/UPC associated with this gun is 600595/ 741566601309 (as marked on the box, with the serial # on there as well), which matches EAA Stock III listing on their website: http://eaacorp.com/portfolio-item/stock-iii-tanfoglio/
I'm guessing that association with a certain product code is likely more important than what is actually stamped on the gun, as far as production legality goes. There are definitely other instances where you can see that happening - for example, the CZ 75 SP-01 Accu-Shadow or SP-01 Shadow Target on USPSA's production list don't have "Accu-Shadow" or "Shadow Target" stamped on them anywhere - just CZ 75 SP-01 Shadow.
Otherwise, that would be a big problem for this latest batch of Stock 2's and Stock 3's getting imported - the Stock 2 that we had on our hands briefly was similarly marked. Instead of "Stock II 919" on the right side of the slide, it just had "Cal 9x19" like the Stock 3's we received. It had the nice new grip style though! For whatever reason, the Stock 3's didn't.
-Kate Arnzen
Arnzen Arms
https://secure.arnzenarms.com/
Shop Phone: 952 944 1875