It looks just like an old field sample testing case HAHAHA.. it holds vials of field samples and test chemicals etc. my dad used to have one for doing soil samples on the farm to test the minerals in it for fertalization etc. back in the 60's. good luck. To bad you didnt get the beaker and glass vials with the black plastic screw caps. you could play hairy potter LOL. as they had different types of acids in some of the vials, they made kewl smoke when introduced to water (sulpher). I never got my but paddeled as bad as I did when I got caught playing with it lol.
Any rate I can't tell for 100% sure but Thats what poped into my old head when I seen it.