Manufactured in 1915, this Colt New Service revolver bears the standard commercial markings, with the addition of a number of distinctive British and Canadian markings. The right side of the frame bears a "broad arrow in C" Canadian proofmark, with the "RNWMP" marking of the Royal Northwest Mounted Police on the spine. One of the parent organizations of the modern Royal Canadian Mounted Police, the RNWMP received the "Royal" designation in 1904. The rear of the cylinder has been stamped with crossed pennant "DPC" proofs, and the left side of the barrel and frame bear "crown/GP" and "crown/V" proofs, crossed pennants and broad arrows, with "D.V. THOMSON/7th A.&S.H." on the left sideplate. While not documented, the 7th A.&S.H. is likely the 7th Battalion of the Argyll & Sutherland Highlanders, a line infantry formation created in 1881 by amalgamating the 91st and 93rd Regiments, the latter being the "Thin Red Line" of the Battle of Balaclava. For World War One the Highlanders served on multiple fronts, with components of the 7th deployed both on the Western Front and in Britain. Research shows an officer named D.V. Thomson with the Argyll & Sutherland Highlanders, in particular noting a temporary promotion from 2nd Lieutenant to full Lieutenant in 1916. Additionally, the top of the frame behind the hammer is marked "10.23/3 COY/7. C.M.G.B./2", indicating the 3rd Company of the 7th Canadian Machine Gun Brigade, which was established in 1919. Fitted with a set of checkered grips with "COLT" imprints at the top.