Roy Ehrhardt

Roy Ehrhardt is the author of books such as Violin Identification and Price Guide, Book 1.

Books by Roy Ehrhardt

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Violin Identification and Price Guide, Book 1

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Waltham Pocket Watch Identification and Price Guide Using Serial Numbers and Pictures Of Waltham Watch Movements

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Violin Identification and Price Guide, Book 2

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Trade Marks

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Foreign Clock Identification & Price Guide