Colt Single Action Army Identification & Dating

A practical reference guide for identifying Colt Single Action Army revolvers by generation, frame and base-pin style, serial format, barrel length, finish, stocks, and common alteration or refinishing clues.

Important collector note: on a Colt Single Action Army, the generation, serial format, and base-pin retention system usually tell the story fastest. However, many SAAs have been rebarreled, refinished, converted, lettered after alteration, or even reworked to imitate earlier and more valuable examples. A good identification should compare the frame, cylinder bushing, barrel length, finish, grips, markings, and serial style before calling a revolver original.

Overview

The Colt Single Action Army, also known to collectors as the SAA, Peacemaker, or factory “Model P,” is one of the most iconic American handguns ever produced. Introduced in 1873, it remained in first-generation production until 1941, returned in second-generation form in the 1950s, and came back again in third-generation form in 1976. Across those generations, the revolver kept its basic profile while showing important detail changes that matter to collectors.

Collector confusion often starts because the Colt SAA looks deceptively simple. Many of the revolvers share the same overall silhouette, yet the details matter: early screw-retained base pins, later spring-loaded transverse latches, removable versus pressed-in cylinder bushings, generation-specific serial styles, and even modern alterations intended to mimic earlier guns. Good identification means reading the revolver as a complete package, not just admiring the outline.

Quick Identification Checklist

Generation Overview

Collectors generally divide the Colt Single Action Army into three generations. That framework is the best first-pass way to identify what you are looking at.

Generation Broad Dates Fast Identification Clues
First Generation 1873 to 1941 Early guns show the classic old-style serial practice, removable cylinder bushing, and on earlier examples the screw-retained base-pin latch. This is the primary frontier and original prewar production family.
Second Generation 1955/56 to 1975 Reintroduced postwar production, very similar in broad appearance to first-generation guns. Serials typically carry an SA suffix, and these guns were made on much of the original tooling.
Third Generation 1976 to present Uses the later production system with a pressed-in cylinder bushing and different barrel/frame thread pitch. Externally similar, but mechanically distinct in key collector details.
Practical note: if a revolver is claimed to be first generation, one of the first things to check is whether the details actually support that claim. Second- and third-generation guns, as well as better reproductions, have long been altered to mimic first-generation SAAs.

Primary Markings

The Colt SAA does not rely on one single marking location as strongly as some military arms do. Instead, collectors usually read several areas together: the serial-number locations, the barrel address line, the frame patent line area, caliber marks, and, in later guns, generation-specific serial format and assembly-number practice.

COLT SINGLE ACTION ARMY .45 COLT 12345

That simplified example is only a reminder of where identification starts. On a real Colt, the exact wording and placement of the markings can vary by generation and period. The best use of the markings is not to memorize one line of text, but to understand which marking family belongs to which production era.

Location What to Check Why It Matters
Frame Main serial number and frame patent-marking area The starting point for generation and originality analysis.
Barrel top Address line style and caliber marking relationship Helpful for broad period and originality clues.
Trigger guard / backstrap Matching numbers or assembly practices depending on generation Useful for spotting mixed or renumbered guns.
Cylinder Bushing type, numbering style, and wear consistency One of the biggest generation and originality checkpoints.
Grip frame and stocks Fit, age, material, and whether the grip style matches the claimed period Helpful in spotting later upgrades and mismatched parts.

Black-Powder vs. Smokeless-Era Clues

One of the first collector distinctions on an early SAA is whether the gun falls into what collectors call the black-powder frame period or the later smokeless-era pattern. The easiest visible clue is the base-pin retention system.

Feature Early Pattern Later Pattern
Base-pin retention Screw-retained base pin on earlier first-generation guns Spring-loaded transverse latch after serial 164,100
Collector shorthand Commonly described as black-powder frame Commonly grouped into later smokeless-era frame discussion
Collector importance Strong clue to pre-1896 production type Strong clue to later first-generation pattern and later generations
Critical visual rule: if the base pin is retained by a screw entering from the front of the frame, you are looking at the earlier system. If the gun uses the familiar cross-frame spring-loaded latch, you are in the later pattern.

Serial & Generation Clues

Serial style is one of the best generation clues on a Colt SAA. First-generation guns use the original prewar numbering system. Second-generation guns use a very distinctive SA suffix serial format, beginning with 1001SA. Third-generation guns return to a different modernized production pattern and are best identified together with the cylinder-bushing and other mechanical clues rather than by serial style alone.

Generation Serial Pattern Clue Collector Meaning
First Generation Original prewar serial family without second-generation SA suffix The true frontier-to-prewar production family.
Second Generation SA suffix serials, beginning with 1001SA The easiest serial clue for identifying second-generation guns.
Third Generation Different later serial family, best read with other mechanical features Should be identified by serial plus pressed-in bushing and other late-production traits.

Colt also notes that its online serial-number lookup is only approximate and should not be treated as definitive documentation. For an original shipping date, original barrel length, finish, stocks, caliber, and shipping destination, the better tool is a Colt Archive Letter.

Common Configurations & Collector Terms

The Colt SAA came in a wide range of barrel lengths, finishes, and chamberings. Three barrel lengths became the most familiar and are still the standard mental picture for most collectors. Be aware that some of the popular names for these lengths are collector terms, not necessarily the exact period Colt factory terms.

Configuration Typical Description Collector Notes
7½" barrel Often called the “Cavalry” length by collectors The original long-barreled military-style profile most people associate with early SAAs.
5½" barrel Often called “Artillery” length by collectors A very common and well-balanced configuration. The nickname is collector usage, and should not replace actual provenance.
4¾" barrel Often called “Civilian” or “Gunfighter” length One of the most popular barrel lengths and a frequent subject of later rebarreling claims.
Storekeeper / Sheriff's models Short ejectorless configurations Highly desirable and commonly faked or created from standard guns.
Bisley / New Frontier / target and special-order variants Distinct grip, sight, or frame variants These require closer model-specific study and should not be judged by barrel length alone.

Historically, the 5½" length appeared first for Colt’s London agency, and the 4¾" length followed later. Colt also produced many special-order and non-standard barrel lengths, which means unusual examples need documentation, not guesswork.

Practical warning: a shortened barrel does not automatically make a revolver a correct Sheriff's or Storekeeper's model. Those are among the most commonly imitated Colt SAA variations.

Finish & Part Clues

Finish tells a great deal on an SAA. The classic look is a blued barrel and cylinder with a color-casehardened frame. Nickel was also an early and popular option. Stocks can be walnut, hard rubber, or special-order materials such as ivory or pearl on higher-grade guns. On later generations, grip and finish combinations can also help separate standard production from special-order or commemorative configurations.

Area What to Look For Why It Matters
Frame finish Color casehardening, nickel, or later refinish appearance One of the biggest visual originality checkpoints.
Barrel and cylinder Correct blue or nickel finish, wear consistency, and polish pattern Helpful in spotting refinish and mixed parts.
Cylinder bushing Removable bushing versus later pressed-in style A major generation clue.
Stocks Material, age, fit to grip frame, and wear consistency Frequently replaced and often overclaimed.
Hammer and small parts Finish, polish, and shape relative to the claimed generation Useful for spotting later substitutions or embellished guns.

Common Alteration, Refinish & Fraud Clues

This is a field where collector caution matters. The NRA Museums specifically warns that Colt SAAs, especially Cavalry and Artillery martial models, are heavily altered, and that second- and third-generation Colts have been changed to imitate first-generation guns. A handsome SAA is not necessarily a correct one.

Collector Notes

The best way to identify a Colt SAA is to work in layers. Start with the generation. Then check the base-pin retention system and cylinder bushing. Next read the serial style and the major markings. After that, verify the barrel length, finish, stocks, and whether the gun matches the kind of variation it is claimed to be.

This matters because the Colt SAA collecting field is full of attractive stories and expensive assumptions. A short barrel does not guarantee a Sheriff's model. A 7½" barrel does not prove Cavalry provenance. A second-generation gun is not automatically lesser, but it should never be mistaken for first generation. And a Colt serial lookup is useful, but a Colt Archive Letter is the stronger tool when originality matters.

Bottom line: on a Colt Single Action Army, “authentic,” “original,” “factory special,” “martial,” and “correct” are not interchangeable terms. A good identification page should help the reader decide which of those categories the revolver actually belongs in.

Research Use

This page is intended as a practical first-pass collector guide. It works best when used to sort a Colt SAA into the correct generation first, then into the correct configuration family, and only then into deeper originality analysis. For high-end work, especially on Cavalry, Artillery, Sheriff's, engraved, factory-lettered, or rare-caliber guns, more specialized Colt references remain essential.

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