Art Deco metal and celluloid double sided Jabot Stick Pin, hat pin, sweater pin

An older metal (front) and celluloid (back) Jabot stick pin or hat pin, the 2 halves screw apart rather than simply pull - so could be fun as a sweater pin too! Mostly in a glossy silver tone with 1 area in a creamy white, the back looks like a purple plastic. Size: 8 cm wide in total.