Manufactured in the late 19th to early 20th centuries, this is a very fine example of a Northern Plains type "Mexican Loop" holster rig. This example does not bear a maker's mark but shares many similarities with the high quality work of W.B. Ten Eyck, based in Billings, Montana. Ten Eyck was born in Pennsylvania in 1858, traveling westward in the 1880s. He originally found work in a Miles City, Montana, saddle and tack shop before moving to Billings and establishing his own shop in 1886. Though unmarked, the quality of this holster is clear, having a single retention loop and a large oval apron. There is light border tooling on the apron and the body of the holster, much like that seen on known Ten Eyck examples. The back of the apron is faintly marked "661049" in ink. The holster itself has a recurved throat, open toe, and will accommodate a Single Action Army Revolver with a 7 1/2 inch barrel. The belt is also unmarked, has a single row of cartridge loops to accommodate .44 or .45 caliber cartridges, a money pocket opening near the buckle, and is fitted with a nickeled buckle with clipped corners. It measures 2 3/4 inches long and 42 1/2 inches long including the billet.