Manufactured from 1961-1964 expressly for the U.S. Army Marksmanship Unit (AMU). It is chambered in the .38 AMU cartridge, which was developed by the AMU armorers of Fort Benning, Georgia for the unit. Only 87 of the pistols were produced, all of which fall in the serial number range 35850-35927. It is rumored that the low production is due to the aluminum frames being unable to hold up to long term firing, because of this they were released to the public. The barrel bears the non-standard "38 A.M.U. CTG." and "52A" markings with otherwise standard Model 52 markings. The accompanying factory letter lists this pistol as a Model 52-A with 4 inch barrel, blue finish and checkered walnut grips when shipped on June 4, 1964 and delivered to Camfour Inc., Westfield, MA. Comes with a copy of the S&W invoice showing a cost of $52.25 when it was shipped to Camfour Inc. in 1964.

Excellent overall, retaining 99% plus original blue finish, limited handling evidence, and sharp grip checkering. Mechanically excellent. Provenance: Dr. Gerald Klaz collection.