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细节
A 19th-Century noon-cannon dial,
unsigned, the oxidised brass cannon with quadrant supports and magnifier frame, with gnomon set for 40° 10', mounted on a circular marble base -- 6½in. (16.5cm.) diameter
See Colour Illustration
unsigned, the oxidised brass cannon with quadrant supports and magnifier frame, with gnomon set for 40° 10', mounted on a circular marble base -- 6½in. (16.5cm.) diameter
See Colour Illustration