RARE, LIKELY THAI CONTRACT, SIG BERGMANN MODEL 1920 SUBMACHINE GUN

Summer 2026 Premier Firearms & Militaria Auction

August 5th, 6th, 7th, 8th, & 9th, 2026
This auction will feature an outstanding collection of items spanning multiple categories including Modern, Military, Sporting, & Antique firearms & militaria! Below is just a small grouping of select highlights from the massive offering to be featured in this upcoming sale!

RARE, LIKELY THAI CONTRACT, SIG BERGMANN MODEL 1920 SUBMACHINE GUN

03-2411 | Cal. 7.63mm (7.63x25mm Mauser). | S# 4906. | Bbl. 8″.

In 1920, Theodor Bergmann licensed production of his MP.18 submachine to SIG in Switzerland, whom with some iterations, would produce the Bergmann Model 1920. Throughout the 1920s, the Model 1920 was sold in three available calibers (7.63x25mm Mauser, 7.65x21mm Parabellum, and 9x19mm Parabellum) to notable countries including Japan, China, Thailand, Finland, and even in small numbers to the United States. The top of the mag. well is marked “BREVET BERGMANN”, with the full S# “4906” marked on top of the housing above the receiver. Metal components exhibit a blue finish overall, with some parts, including the bbl., bbl. end cap, bolt, firing pin, and receiver end cap appearing to have been cleaned and polished in-the-white. 1-piece finger grooved pistol grip buttstock with plain steel buttplate. Dovetailed blade front sight with Thai graduated rear sight. Toeline of buttstock and underside of receiver feature sling swivels which are fitted with a brown leather sling of Japanese origin, featuring 2 kanji characters in white paint on the rear. Perforated bbl. shroud and bbl. / shroud end cap. All serialized parts are matching and include the receiver, receiver end cap & end cap release lever, bolt carrier, receiver hinge plate, hinge screw, receiver latch, trigger guard, stock, as well as the buttplate. Buttstock is stamped with a boxed “MORRISON/ BRADFORD, MAINE” beneath the buttplate. (NOTE: Former Carl “Bill” Morrison Collection, JDJ, Lot 3019, Fall 2013) NFA registry lists “BERMANN” in the mfg. block. MAGS: x1 Finnish 50-rd. stick mag., marked with the Sako “S” within a cog insignia on the rear towards the floorplate.  PROVENANCE: Military Museum Collection of Shooters Outpost, Hooksett NH. NATIONAL FIREARMS ACT MG REQUIRING BATF TRANSFER BEFORE TAKING POSSESSION. FULLY TRANSFERABLE. STATUS: CURIO. CLASS III.