British Made Vintage Red Casein 7cm Buckle for up tp 4.5cm Belt.

This big red buckle came on a display sheet with 

"BRITISH MADE CASEIN PRODUCT"

stamped  the bottom

It's 7cm tall, 6cm wide and the aperture is just over 4.5cm tall and each side is 17mm wide. So will fit a belt up to 4.5cm wide.

There is interesting etched criss cross detailing on one side.