Either sometime between 1976 and 1987 or else sometime between 2007 and today (from 1987 onwards, the company operated as "New Detonics" until it was shut down in 1992).
Serial numbers aren't unique to one firearm, and we don't know even know what model pistol you have (Detonics has more than one model in their line). If you call their customer service at (618) 476-3200 and can provide them with the exact model, they could probably do more for you than we could here.
The phone number of the Upshur County Public Library is: 304-473-4219.
The phone number of the Kimble County Historical Museum is: 325-446-4219.
The phone number of the Miami Beach Regional Library is: 305-535-4219.
The Bold and the Beautiful - 1987 1-4219 was released on: USA: 21 January 2004
4219.0
The address of the Northside is: 4219 Hamilton Ave., Cincinnati, 45223 2033
4219 Fair Ranch Rd.Union City,Ca,94587 in his house. anywhere he wants
The address of the Taylor Community Library is: 12303 Pardee Road, Taylor, 48180 4219
The address of the Pekin Public Library is: 301 South Fourth Street, Pekin, 61554 4219
The address of the Brevard Botanical Garden is: 3695 Lake Drive, Cocoa, FL 32926-4219
The address of the Tennesse Eagle Forum is: 3216 Bluewater Trace, Nashville, TN 37217-4219
The address of the Putnam County Public Library is: 4219 State Rt. 34, Hurricane, 25526 7307