Softly Curved Vintage 1940s White 5.5cm Buckle for Up to 4cm Belt

Softly Curved White 1940s belt Buckle.
5.5cm tall, and 4.5cm wide.
A belt up to 4cm wide would fit.
There is slightly indented detailing on each side,and the whole buckle is gently curved 

They were found in an old warehouse - excellent unused condition.