G220 should put your P220 around 1994 (like mine)...does it have W. Germany written on it or just Germany??? (even though by then German had re-united, mine still has W. (West) Germany written on the slide as SiG was using up old stock...look under the slide (dust cover) and you should see some cartouche's where it was proofed in Germany...should be a stamped steel and folded slide pinned to a breach block and have the newer rounded hammer with the additional safety intercept notch for decocking the earlier spur hammered P220s did not...not really earlier (depending on your perspective as the P220 came out in the 1970's) but many people prefer the German made SiGs or the earlier stamped steel slide ones...
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Last edited by silversport; 03-02-2011 at 08:52..