Hi Jeff, the best way to find out what model AyA you have is to e-mail them. They are very, very responsive, about a day turn around. All you need to send them is the SN. Here's a link to them:

http://www.aya-fineguns.com/contacto_en.php

There is no way to track what model you have thru the SN. No one here has the AyA company records.

Best of Luck!!

Greg

Gregory J. Westberg
MSG, USA
Ret