Union's predecessor, Colton Manufacturing Co. (1894-1902), made a double for Sears. Cleverly designed with coil mainspring striker locks set into sideplates. Union double in 12- and 16-gauge, with steel or Damascus barrels derived from it, but was a traditional hammerless sidelock side-by-side well-made gun (1902-1913) and also sold by Sears. Values depend on grade and condition. Union also offered, about 1905, an unusual boxlock hammer gun Model 25 in 12-gauge only. Employs external hammers, but they are mounted within frame and spurs protrude in front of top-snap opener. These guns are hard to find and values range from $300 to $1,200 depending on condition. Produced with steel twist or Damascus barrels only in plain grade.