A mid 19th-Century brass cannon dial signed James Parsons incorporating an inset compass with blued-steel needle, the gnomon with sight over firing hole of the tapering cannon and hinged magnifier over sight, the weighted-dial set in a gimball and mounted in a stand -- 9¾in. (25cm.) high See illustration
A mid 19th-Century brass cannon dial signed James Parsons incorporating an inset compass with blued-steel needle, the gnomon with sight over firing hole of the tapering cannon and hinged magnifier over sight, the weighted-dial set in a gimball and mounted in a stand -- 9¾in. (25cm.) high See illustration
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