The four pieces of this model may be arranged as a square or and equilateral triangle. The container is a reused aspirin tin. A drawing in 1979.3002.53 dated January 5, 193? refers to this model as 4C. This small version of the model does not have hinges. It is stored in a metal case marked: ASPIRIN.
Compare MA.304723.764, MA.304723.819, MA.304723.766, and MA.304723.823.
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