I am cleaning an old gen1 G17 for a coworker. His grandpa carried it as a cop. The serial number prefix dates to 1988, but the next part is '003 US'. Are the glock serial number sequential? Was this the third Glock made that year? Doesn't really matter.we are just curious.
Glock Model 26, 9mm caliber, serial numbers DGU, DHR DKU. Glock Model 27,.40S&W caliber, serial numbers DGD, DGV, DHS, DHT, DKV, DKW, DKX. Don Bulver, warranty department of Glock, Inc., indicated the recoil springs produced before September 1999 may shear off on some of these pistols due to over hardness of the support tube.
I would send an email to Glock and ask them. I know I sold a G34 to a dealer up in Boston and I was pretty sure that I got it right when they first came out back in 1998 or so. He would only be allowed to sell it if it was older than a certain date. He checked with Glock to make sure that it was by the serial number. He confirmed it was one of the early ones. They could probably tell you for sure.