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The grips are typically a brown stained wood with a raised crosshatch pattern. The serial number will also be on the barrel, sometimes without the trailing alphabetic suffix. The serial number typically appears in 3 places, the left frame above the trigger, and immediately above that on the left center slide. A wooden shoulder stock/holster with a cup that accepts an unaltered Steyr-Hahn's frame about the grip is occasionally seen. The Czechs were known to have converted some military issue Steyr-Hahns to full auto with a similar mechanism as the factory produced weapons but without the extended magazine.
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A few Steyr-Hahns Model M16 in full auto with extended magazines were used in WWI and by early Austrian Nazis. Guns with both Romanian contract parts and Austrian acceptance proofs are common for this transition period. It should be noted that serial numbers for the Romanian contract guns are directly continued into the guns produced for the Austrian Army, when the contract for Romania was discontinued. The Chilean Army adopted the M11 and that model bears a crest also. The Romanian police used the Steyr-Hahn and that version bears a Romanian Crest. The gun was produced until 1919 although it is believed that many were assembled from parts for several years thereafter.
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The M12 was evaluated for military use, but was not adapted by the Austrian Army until the First World War began. The model M12 with dovetailed front sight is otherwise identical. It is an 8 shot top loader that is stripper fed, shooting the 9mm Steyr cartridge. The Steyr-Hahn (Hahn is German for hammer) pistol was first produced in 1911 with a fixed blade front sight, the model M11.
