it seems to be a Delphin 1. I didn;t find much information, so I keep working on that. I read that there had been only 3-4 done, but all of them destroy. The one I have came from Argentinean Navy...I wonder if some of those 3-4, instead of being destroy, had been shipped to the pro-Nazi govermant of those days..or if there had been many more than 3-4.

Any information, is higly appreciated.

Tks