Antique Opera or Horse Racing Binoculars Mother of Pearl Fitted Leather Case

A beautiful large antique pair of binoculars decorated with mother of pearl in Fantastic condition still in the original leather box with initials E B lined with plum coloured velvet (box has outer storage wear). Little mother of pearl winder in the middle extends them for a longer reach. In lovely condition and an unusual size, not sure if they were for opera or horse racing. 

Measuring 12 cm x 12 cm when retracted