Bradbury, F. Bradbury's Book of Hallmarks: A Guide to Marks of Origin on British and Irish Silver, Gold and Platinum and on Foreign Imported Silver and Gold plate, 1544 to 1984 / Old Sheffield Plate Markers' Marks, 1743 to 1860. J.W. Northend.
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Tohutoru Kātū Chicago (17th ed.)
Bradbury, Frederick. Bradbury's Book of Hallmarks: A Guide to Marks of Origin on British and Irish Silver, Gold and Platinum and on Foreign Imported Silver and Gold Plate, 1544 to 1984 / Old Sheffield Plate Markers' Marks, 1743 to 1860. Sheffield, Inglaterra: J.W. Northend.
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Tohutoro MLA (9th ed.)
Bradbury, Frederick. Bradbury's Book of Hallmarks: A Guide to Marks of Origin on British and Irish Silver, Gold and Platinum and on Foreign Imported Silver and Gold Plate, 1544 to 1984 / Old Sheffield Plate Markers' Marks, 1743 to 1860. J.W. Northend.
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