See more items in
National Air and Space Museum Collection
A single, rounded object with a flat base (no elevated rim). There appears to be a circular depression around this base. The center has an elevated, rounded block of wood, 1.075" wide and 2.5" high, with a 1.5"center hole that goes through object to the other side. The reverse side has an elevated inner rim towards the center and an lower 0.5" high outer rim,and a 1.125" wide towards its edge.
Transferred from the Smithsonian Institution to the United States National Museum.
Country of Origin
United States of America
3-D (Overall): 10.8 × 15.9cm (4 1/4 × 6 1/4 in.)
National Air and Space Museum
Restrictions & Rights
Usage conditions apply