An unusual English 18th-Century calendar dial,

Details
An unusual English 18th-Century calendar dial,
the months engraved in Latin, with day divisions, February marked for twenty eight days, with adjustable cursor and alidade, with one (of two) plane sights, silvered on one side, on angled stand and circular base, overall diameter -- 6 7/8in. (17.5cm.)

See Colour Plate 7

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