Rifleman Q&A: Puzzled By S&W Revolver Markings

by
posted on June 15, 2021
** When you buy products through the links on our site, we may earn a commission that supports NRA's mission to protect, preserve and defend the Second Amendment. **
RHKP

Q: I recently inherited a Smith & Wesson Model 10-7 revolver chambered in .38 Spl. The markings shown on the gun leave me puzzled. The backstrap is stamped “RHKP 1759.” Stamped on the butt of the grip is “AAM7024,” and there is lanyard ring. The cylinder’s crane reveals the model and another number “42917,” which, if I had to guess, is the serial number. I’ve been going in circles trying to find information about this revolver. What have I been given here?

Smith & Wesson Model 10-7 revolver

A: Your reference to the revolver’s model number is correct. It is a Model 10, which, prior to 1957, was known as the .38 Military & Police. The general design dates to 1899 and represents the longest-running model produced by S&W, and not surprisingly, it has also been produced in the greatest numbers. The frame size is denoted as “K” and corresponds to medium size. In this case, it can also be referred to as the K-frame service version, meaning it features fixed sights rather than the adjustable type as on the target models.

The “-7” in the model number represents the seventh engineering change to be incorporated into the design since 1957. I am not sure of the current “dash number,” but believe it to be in excess of “-14.” The “42917” is not the serial number, but is more likely an “assembly number” used to keep critical components matched during production. The serial number is actually found on the butt. In 1982, the pin securing the barrel to the frame was eliminated, and a three-character alpha prefix was added to serial numbers. These two features will date your revolver to 1982 or later.

Because of the popularity of the Model 10 with law enforcement entities around the globe, there is a subset within the collector groups of guns that can be identified with specific agencies. In this case, “RHKP” stands for Royal Hong Kong Police. The “1759” on your revolver is a “rack number” or some means to maintain accountability. Other features include the standard-weight barrel and lanyard ring. This version was produced around 1983, apparently in large numbers. According to Standard Catalog of Smith & Wesson, 4th Edition, by Jim Supica and Rick Nahas, some 13,000 of these models were offered as trade-ins for new firearms, and were acquired by the Accusport company for sale in the United States.

In addition to the above information, I also notice that a prior user altered the factory stocks by cutting away the upper “horns” that extended to the hump behind the hammer.
—John W. Treakle, Contributing Editor

Latest

Glenfield Model A
Glenfield Model A

Review: Glenfield Firearms Model A

The Glenfield Firearms Model A is a stalwart budget option returning to the market under the Ruger umbrella.

Skills Check: Taking Time Off

Our drill this month is a real worker bee. It trains you to deliver a well-placed transition round and deliberately decreases the time it takes you to move the muzzle and set up for the next one.

Range Review: Canik Prime Radian

With the new Canik Prime Radian, you can have your compensator and your flared magazine well, too, all inside an easily carried, compact handgun.

New for 2026: Franklin Armory 5.56 Rabbit Rounds

Franklin Armory's new 5.56 NATO Rabbit Rounds provide a spin-stabilized, multi-projectile ammunition option for America's rifle.

ATF Ends Enforcement of NFA Registration & Approval Requirements for Suppressors, SBRs, and SBSs Following NRA Victory in Jensen v. ATF

Today, the ATF confirmed it will no longer enforce National Firearms Act (NFA) registration, application and tax-stamp requirements for short-barreled rifles, short-barreled shotguns, suppressors and certain other concealable firearms.

Gun of the Week: H&K VP9CC

Hot on the heels of its CC9 micro-compact, Heckler & Koch introduced a micro companion to its popular VP9 lineup that includes some noteworthy features.

Interests



Get the best of American Rifleman delivered to your inbox.