large old vintage Armstrong Tool bridge builder/engineer's wrench, #40-A, 1-11/16'' & 1-5/16''

Large old vintage double open end industrial engineers and bridge builder's wrench. It is made by Armstrong Bros Tool Co. and is marked with their "Strong-Arm" logo. This big old wrench is about 15" long overall. It is marked 1-11/16 inches and 1-5/8 inches. This wrench is also marked "40-A". This old wrench has a patina of age and some minor rust.