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W (Open Shelf)Patent Office
Patents for Inventions. Abridgements of Specifications. Class 139, Watches, Clocks, and Other Timekeepers
Period - A.D. 1855-1866 [to] Period - A.D. 1926-30. London: Printed for His Majesty's Stationery Office, ... Published at the Patent Office ... [and variants], 1905-1934. [Facsimile reprint in two volumes]. Seattle: Odmark, 1979.
[1988-132]
1979