(Note: Measurements are outside max. dimensions unless stated otherwise).18th Century : Delicate mount with leaf design on bobbin bead platform. Width 30mm. (1 1/8")Length 178mm. (7 1/16")Depth 6mm. (1/4")Thickness (variable) 3mm. (1/8")Hollow curved back designed to fit on rounded moulding.Could be flattened if softned by annealing. (Heat to cherry red colour, and plunge into cold water).