[nb-NO]Details[nb-NO]

A-170

Backstaff

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.

Signed on the lnlaid boxwood plate in the main strut: "Made By William Hart in Portsmouth N:E/For (?) 1763"

mahogany, boxwood

United States

	Imperial(in)		Metric(cm)
Height			61.5
Width			35.8
Depth			12
Diameter
Circumference

	Imperial(in)		Metric(cm)
Height
Width
Depth
Diameter