Could be for a watch or pocket watch. In average condition, but boxes of this era are hard to come by. Measures 12cms x 7.5cms x 3.5cms high. No insert just the outer box

c1930s / 1940s Unbranded Mens Watch Display Case.13.5cms wide x 5cms deep x 2cms high. Externally surface wear, losses, scratches & marks. Internally aged with stains & marks. Selling AS IS...

Possibly a small mens or but unsure. Measures 9.3cms wide x 4.7cms deep x 3cms high. Opens & closes well, generally nice condition. 

5.5cms square x 1.8cms high. The corners of the box base have pulled away.