This is not an "Essex crystal"--let's get that misnomer out of the way quickly. This is a 1/2 inch very fine quality reverse intaglio painted glass in 0.800 silver--nice quality and excellent condition. Edwardian gentlemen wore these both as cuff and vest buttons. Some endure, some limp along hoping to pass as Essex crystals. I think the subject is a Staffordshire Bull Dog. Housebroken, of course.