Overall: 3 3/8 x 6 7/8 x 2 1/2 in. ( 8.6 x 17.5 x 6.4 cm )
Ovoid with bolt on back; inscribed front in bold letters and script.
Bequest of Major Nathan S. Jarvis, Jr.
engraved: on front: "DR. JARVIS,/U.S.A"
Due to ongoing research, information about this object is subject to change.