Over the past several years I have amassed a smallish collection of West German .25 acp semi-automatic pistols ("mouse guns"). They are all basically the same gun just with different names (importers?) such as PIC, Valor, Reck, Gecado and Hawes. Almost all of them have a 2-digit numerical stamping on the left side of the slide. This number is inside what looks to be a shield or badge shaped design. I have always thought this number to be the year of manufacture and others I have talked with about this think it is as well. My question is this; does anyone know where I could find confirmation that the number is in fact the year of manufacture? I know, I know....anyone can put anything on the internet. That does not make it true. I haven't found anything pertaining to these numbers on these guns. Any help?