High Standard DM-101 .22 WMR Over/Under Derringer, 3.5 in Barrels, DAO, Hamden CT
This High Standard DM-101 is a compact, steel-frame over/under derringer chambered in .22 WMR. Marked with the Hamden, Connecticut address and Hi-Standard Derringer logo, it features twin 3.5 inch barrels, a double-action-only internal-hammer system, and white synthetic grip panels. The second-series Hamden marking pattern points to late 1960s–1970 production, combining collectible appeal with a distinctive DAO alternating-barrel design.
Condition
Overall Condition: Fair condition, showing extensive signs of prior use and handling.
Bore Overall Condition: Fair - Generally clean, some residue or smudges, slight corrosion.
Bore Fouling: Mild Fouling - Light buildup of fouling or dirt.
Bore Rifling: Fair Rifling - Worn rifling, slight loss of definition.
Specific Condition Notes: The firearm is mechanically solid. The exterior shows scattered scratches and blemishes from prior handling and use.
What’s Included
- High Standard Model DM-101 .22 WMR derringer
The DM-101 is clearly marked ".22 Magnum Cal Model DM-101" and carries the Hamden, Connecticut address with the Hi-Standard Derringer logo. Its over/under twin barrels measure 3.5 inches and open via a break-open hinge with a top-mounted serrated latch for loading and unloading.
The DAO internal-hammer system uses an alternating striker to fire one barrel per trigger pull. Capacity is 2 rounds. Sighting is simple and robust with a fixed front blade and an integral rear notch, and the backstrap is grooved for purchase.
Construction is all steel for the frame, receiver, and barrels, paired with white synthetic grip panels. Despite the steel build, it remains highly compact at approximately 5.125 inches overall and about 11 ounces in weight, fitting the "micro" derringer profile.
Marking pattern and origin point to second-series Hamden manufacture from the late 1960s–1970 era. The DM-101 line debuted in 1969 and continued in production until 1984, and this example aligns with those early-production characteristics.