The serial number is worn or only partly readable

You can see some of the number — the last few digits, or a partial stamping. Before concluding the marking is lost, check the places a serial is normally put: on many firearms the number you are looking at is a secondary one, and the serial is somewhere less exposed.

Date your firearm by its serial number

Every result names the documented threshold it came from, so you can check the reasoning yourself.

Open the serial number lookup

Where firearm serials are actually stamped

The location follows the design of the action, so it varies by type. The common positions:

Only disassemble what the owner's manual documents. Removing furniture is normally straightforward, but forcing a part — especially a screw, a pin or a glass-bedded action — causes damage that costs far more than the date is worth. If you are unsure, stop and let a gunsmith do it.

How to raise a faint or shallow stamping

The goal is to make the existing metal displacement easier to see, without removing any metal. In order of increasing risk:

Do not use abrasives, acids, rust removers or a wire brush to "bring out" a serial number. Every one of those techniques removes the metal displacement that the marking consists of. A serial you can just read becomes a serial that is gone, along with much of the firearm's value.

Do not re-cut, deepen or "restore" a serial number. In the United States, 18 U.S.C. § 922(k) makes it unlawful to possess a firearm whose serial number has been altered or obliterated. A well-intentioned attempt to make a worn number legible can create a serious legal problem where none existed. Read what is there, record it, photograph it, and leave the metal alone.

If only part of the number is legible

The lookup needs a number to compare, and a partial serial usually cannot be extended honestly — the missing digits could be any value, and the year changes with them. Two things are worth doing instead:

The last three digits are clear and the rest is gone. Is that enough?

Rarely for a year. A serial is compared by value against thresholds, so unknown leading digits leave the value unknown across a wide band. Treat the gun as datable to the model's production period, not to a year.

Could the number be under the grips?

Very often, on revolvers. Grip panels are removed with a single screw on most designs and the frame beneath is frequently unworn. It is the first place to look when the exposed stamping is faint.

Is a faint serial a sign the gun is stolen or renumbered?

Not by itself — wear and shallow factory stamping are far more common. What warrants suspicion is a stamping that looks fresher than the surrounding metal, sits on an obviously polished area, has inconsistent spacing or depth, or has been cut over with a different font. If you see that, get an expert opinion before any transaction.