Crown Ducal England printed mark from Richardson's, c1932-1935.
Crown Ducal England Richardson's printed mark with Charlotte Rhead facsimile signature, c1932-1935.
Crown Ducal Made In England Richardson's pottery printed mark, c1935-1938.
Crown Ducal Ware Made In England printed backstamp in use from the late 1940s.
Crown Ducal Ware England printed black mark in used from c1925+.
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