In antique firearms, value is concentrated in a handful of marks: the right martial inspector's cartouche, a scarce factory variation, a low or historically significant serial number. Those marks are small, shallow, and made of metal — which means a competent machinist can add, remove, or alter them. A $1,500 gun can be re-stamped into a $40,000 one in an afternoon.
Serial-number fraud
Renumbering turns an ordinary receiver into a "rare early production" example, or makes a parts gun appear to have its original matching components. The fraud ranges from grinding and re-striking a single digit to fabricating an entire serial to match a documented historical gun.
Faked martial and proof marks
- Inspector cartouches added to a commercial gun to fake military issue
- Proof marks struck to imply a desirable arsenal or nation of origin
- Unit or rack markings added to invent a regimental history
- "Matching numbers" forced by re-stamping mismatched parts to agree
Metal remembers. A re-struck stamp disturbs the surrounding surface, the bluing, and the depth of the original strike. Under magnification and raking light, a fresh stamp on old steel almost always tells on itself.
The tells
Stamp depth and font that don't match the period die; metal flow and burring around a "100-year-old" mark; bluing or patina that is wrong inside the stamped letters; serial digits with inconsistent spacing or alignment. Any one of these on a high-value mark should stop the transaction until it is explained.
Protect yourself
- Photograph every mark under raking light at high magnification
- Compare font, depth, and placement against documented factory examples
- Check that patina and bluing are continuous through the stamped areas
- For high-value marks, commission an independent metallurgical examination