细节
A brass pocket sundial
with horizontal plate divided 1-4 and 8-10 with inset compass and folding string gnomon and plum bracket, on three levelling feet -- 3¾in.(9.5cm.)diam.
with horizontal plate divided 1-4 and 8-10 with inset compass and folding string gnomon and plum bracket, on three levelling feet -- 3¾in.(9.5cm.)diam.