Signedengraved on dial plate near compass: fait Par Menant AParis
engraved in the southwestern and southeastern corners of the plate: Inventé / Par Cosle
FunctionTime finding at one latitude after orienting the gnomon to point toward true North.
ProvenanceEl Beuf; Harrold E. Gillingham Collection (inv. no. 41); David P. Wheatland, Topsfield, MA, 1949; gift to CHSI, c. 1985.