This object is not on display at the National Air and Space Museum, it is either on loan or in storage.
Donated by Mr. Richard Lynch
Country of Origin: China
3-D Test: 11 x 1.5 x 7cm (4 5/16 x 9/16 x 2 3/4 in.)
Physical Description:Wooden abacus; black beads.
Inventory number: A19970126000