Overall: 7 1/2 x 7 in. ( 19 x 17.8 cm )
mat: 11 x 14 in. ( 27.9 x 35.6 cm )
inscriptions: Bottom corner: Gibbs ; BMT 67, Standard AB, LOV, 39, Worlds Fair, Rio, R15, R33, R32, R40, R46
Inscribed at lower right in graphite: "R40"
Gift of George Gershinowitz
Due to ongoing research, information about this object is subject to change.