M.”. 5 1/4″ high x 3 1/8″ wide x 1 3/4″ deep (with dial) x 1 1/8″ deep (without dial). All steel. “GARNY FRANKFURT A.M.” is stamped on the dial. Once the padlock has been opened you may insert a change key to unlock the wheels and subsequently change the combination. The mechanism appears to be similar to some S&G safe locks.