2 1/4″ high x 1 7/8″ wide. Iron body. Iron shackle. Warded. Curved recess shackle. This padlock is similar to the John Gerard “Eagle Liberty” in size and shape. The curved recess shackle is characteristic of other John Gerard designs. Some molds have very minor size and detail differences. “BHMA” and crossed pick and shovel are embossed on the reverse of the body. I believe this lock is related to the Black Hills Mining Association, Deadwood, South Dakota.