This monogram was created by AA Turbayne, in his book Monograms & Ciphers, London, England, (1906). 

Monogram: MOM

Accents/Accessories: Beaded attached bail; Leafy border around the top of the piece; Biased edging; Smooth background

Size: 40 x 32 millimeters (1.57 x 1.26 inches)

Weight: 13 grams (0.46 ounces)

Sterling Silver Chain as shown: 16 inches - $25.00 or 18 inches - $35.00