This monogram is from the heraldic artist AA Turbayne, as featured in his book Monograms & Ciphers, London, England, (1906). This pendant is round in shape, with a hidden attached bail on the reverse of the piece, and a cut out monogram on the detailed background.

Monogram: GHG

Size: 2 x 1.8 mm

Weight: 33.6 g