The Norwegian Kongsberg Model 1914 was a slightly modified copy of the U.S. Model 1911 pistol used by the Norwegian army. These pistols are nearly identical to the Colt Model 1911. This Model 1914 features a slide dated "1928" on the right side. The left side of the slide is marked with the later model 1914 caliber, model, and serial number marking with the monogram of King Haakon and the Kongsberg Crest. Inspection mark behind the rear sight. Matching serial numbers found on frame, slide, trigger, safety, mainspring housing, grip safety, hammer, ejector, magazine catch, barrel, and slide release. The included factory letter gives dates for proof firing, initial inspection, sighting in firing, final inspection, as well as shipping date to Oslo's Main Arsenal to be used by the Air Force Battalion in 1940. The letter also states this pistol is referenced in the book Kongsberg-Colten by K.E. Hanevik on page 391.