Simple brass display cases

[Dave Coatsworth]

First time I've come across this type of jeweler's display case. They are made of brass. Snap-on front bezel and a hole for winding. 16 and 12 size. No lever slot. Does anyone know if they were a product of one of the jeweler's supply houses of the time, or were they distributed by one of the factories?

[Jon Hanson]

in my experience these housed earlier movements and were shipped in same from the factory