How to Date and Identify a Smith & Wesson K-Frame Revolver
This lookup is a starting point for estimating when a Smith & Wesson K-frame revolver was manufactured. A serial number can place a revolver within a production range, but it usually cannot identify the exact model by itself. Smith & Wesson used shared serial-number blocks across several K-frame models, so the best identification combines the serial number with the model stamping, caliber, barrel markings, sights, finish, and physical configuration.
Where to Find the Serial Number
On most Smith & Wesson K-frame revolvers, the official serial number is stamped on the bottom of the grip frame. Factory stocks may cover it, so the stocks sometimes must be removed carefully to read the complete number. The same number may also appear inside the yoke or crane area and on other fitted components, but those secondary markings can be assembly numbers rather than the legal serial number.
Use the number from the butt of the grip frame whenever possible. Enter all letters and digits in their original order. Spaces and hyphens generally do not affect this tool, but prefixes such as K, C, D, V, or a three-letter combination are important and should not be omitted.
What Common K-Frame Serial Prefixes Mean
Why the Serial Number Does Not Always Identify the Model
A frequent mistake is assuming that a K-prefixed serial number automatically identifies a K-22 or a particular numbered model. Smith & Wesson assigned numbers from shared sequences to multiple revolvers built on the same frame family. A serial range may provide a credible production window while leaving the exact model uncertain.
To confirm the model on a post-1957 revolver, unload it, open the cylinder, and examine the frame cut visible behind the yoke. Smith & Wesson commonly stamped designations such as MOD 10, MOD 17-3, or MOD 19-4 in this area. Earlier pre-model revolvers may have no model number because Smith & Wesson did not begin routinely using numerical model designations until 1957.
Caliber markings and features provide additional evidence. Fixed or adjustable sights, barrel length, blue or stainless finish, square or round butt, extractor-rod design, barrel pin, recessed chambers, and grip style can help determine whether the revolver matches the model and period suggested by its serial number.
Understanding Smith & Wesson Dash Numbers
The number following the hyphen in a model designation identifies an engineering revision, not the year of manufacture. For example, a Model 19-3 is the third major engineering variation of the Model 19. Each dash change may correspond to a mechanical or manufacturing revision, but the changeover dates are approximate and do not replace serial-number research.
Dash numbers are especially useful when checking whether a revolver's features are consistent. A claimed production date should make sense alongside the stamped dash variation, barrel attachment, cylinder treatment, sights, finish, and factory options. When those details conflict, the revolver may have replacement parts, a refinished surface, a factory repair, or an incorrectly reported serial number.
How to Verify a Lookup Result
- Confirm the complete serial number from the bottom of the grip frame, including every letter prefix.
- Record the model and dash number from the frame cut beneath the yoke, if present.
- Compare the caliber, barrel length, sights, finish, and grip-frame shape with known factory configurations.
- Use the lookup result as a production range rather than an exact shipping date.
- For a valuable, unusual, or disputed revolver, obtain a factory historical letter or other authoritative documentation.
Accuracy and Important Limitations
Published serial-number tables often identify the first serial number reported for a year, broad blocks assigned during a period, or observed examples rather than a complete day-by-day factory ledger. Frames could be manufactured, assembled, inspected, and shipped at different times. A revolver near the beginning or end of a range may therefore overlap the adjoining year.
Serial numbers also cannot establish originality. Stocks, barrels, cylinders, sights, and finishes may have been changed during decades of use. The lookup result should be treated as one part of a complete collector examination, particularly when evaluating scarce barrel lengths, premium finishes, military markings, law-enforcement provenance, or high-condition examples.
Smith & Wesson K-Frame Lookup FAQ
Does a K prefix mean the revolver is a Model 17?
No. The K sequence was shared by several target and adjustable-sight K-frame models. Check the model stamp, caliber, and configuration.
Can this lookup provide an exact manufacturing date?
Usually it provides an estimated year or production period. Exact shipment information generally requires factory records.
What if there is no model number inside the yoke?
The revolver may predate the 1957 model-number system, or the marking may be faint or obscured. Identify it through serial range, caliber, markings, and physical features.
Why does my serial number return more than one possible model?
Smith & Wesson used shared serial blocks. That is normal and means the frame stamping and revolver features are needed to complete the identification.
Continue Your K-Frame Research
For expanded serial tables, model history, identification details, and collector context, use the complete Smith & Wesson K-Frame Serial Number Master Guide. You can also browse the site's Smith & Wesson and classic revolver collector guides or return to the firearm serial-number lookup and identification hub.