Welcome to today’s Photo of the Day! This unusual Colt revolver showcases how even major manufacturers experimented with designs that never made it to production. Serial number 4 of the Model 1878 “Frontier” double action, it features a hammer shroud configuration that never reached mass production – essentially making it a factory experimental. While the Single Action Army gets all the glory, Colt’s 1878 double action was their attempt to offer something more modern for the frontier. About 51,000 were made compared to over 350,000 SAAs, but they found favor with folks who appreciated the quick double action trigger for defensive use. What makes this gun truly special is that bizarre hammer shroud – a metal cover over the hammer that’s attached by a single screw at the top of the frame. Combined with the spurless hammer, this configuration is likely unique. Add in its non-standard 5 7/16″ barrel length and .455 caliber chambering (typically found in much higher serial number guns), and you’ve got something that screams “factory experiment.” The London address on the barrel (“DEPOT 14 PALL MALL LONDON”) adds another layer of interest, as these .455 guns were primarily intended for the British military market. This revolver’s importance is confirmed by its provenance – formerly part of the legendary William Locke collection and featured in Frank Sellers’ book where it’s described as “possibly unique.” For Colt collectors, serial number 4 with factory experimental features represents the kind of gun that rarely emerges from private collections.
“Hammer Shroud Colt London Model 1878 Revolver Serial No. 4.” Rock Island Auction Company, https://www.rockislandauction.com/detail/4094/84/hammer-shroud-colt-london-model-1878-revolver-serial-no-4. Accessed 24 Mar. 2025.
Writer | TheFirearmBlog
Writer | AllOutdoor.com Instagram | sfsgunsmith Old soul, certified gunsmith, published author, avid firearm history learner, and appreciator of old and unique guns.
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