Corn Yellow 1940s French Casein 4.5cm Buckle

A lovely calm and happy corn yellow colour with subtle surface colour variations, characteristic of this kind of vintage casein plastic - each buckle is a little different.
4.5cm tall, and 4cm wide, gently curved for a perfect fit on your belt.
The inside aperture is just over 4cm tall.
I found these in an old haberdashery warehouse -they are in excellent unused condition.