It'll have a "year-of-proof mark" someplace on the receiver water table (or on the side of the receiver, but that's less likely in a highly engraved gun). The marking will be either a single capital letter or a letter and a number.

The key to deciphering this can be found at www.largoista.com or as a "sticky" at the beginning of the threads of the "Spanish Pistols" forum on www.gunboards.com/forums, among others.

A good gun at a good price, IMO.