Arcs of boxwood; limbs of mahogany. Original wooden vanes; notched shadow vane, pin-hole sight vane; slit horizon vane. Signed on boxwood plate inset in horizon limb. Space for owner's name to be inserted. Greater arc, 0-65 every one degree. Short arc, 65-90 degrees every 10 degrees on inner edge, and 0-25 degrees every 10 degrees on outer edge; by transversals to one degree. Star border decoration; scrolling end. Brass rivets. The vanes have flat brass pressure springs for securing them to the arcs. Lens is not there.
Material
Signed on the lnlaid boxwood plate in the main strut: "Made By William Hart in Portsmouth N:E/For (?) 1763"
