Roy Ehrhardt (Ehrhardt, Roy)

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• 
  American pocket watch 1977 price indicator: Identification and price guide
  

  by Roy Ehrhardt

  ISBN 9780913902219 (978-0-913902-21-9)
  Softcover, Ehrhardt, 1976

  
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  • American pocket watch 1977 price indicator: Identification and price guide: ISBN 9780913902219 (978-0-913902-21-9)
    Softcover, Ehrhardt, 1976
• 
  Bradley Character Watches Identification & Price Guide
  

  by Ehrhardts, Roy Ehrhardt

  ISBN 9780913902899 (978-0-913902-89-9)
  Softcover, Heart of America Pr, 1994

  
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  • Bradley Character Watches Identification & Price Guide: ISBN 9780913902899 (978-0-913902-89-9)
    Softcover, Heart of America Pr, 1994
• 
  Cartier: Wrist & Pocket Watches Clocks: Identification & Price Guide 1992
  

  by Roy Ehrhardt , Joe Demesy

  ISBN 9780913902622 (978-0-913902-62-2)
  Softcover, Heart of America Pr, 1992

  
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  • Cartier: Wrist & Pocket Watches Clocks: Identification & Price Guide 1992: ISBN 9780913902622 (978-0-913902-62-2)
    Softcover, Heart of America Pr, 1992
• 
  Foreign & American Pocket Watch Identification & Price Guide
  

  by Roy Ehrhardt

  ISBN 9780913902165 (978-0-913902-16-5)
  Softcover, Heart of America Press, 1976

  
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  • Foreign & American Pocket Watch Identification & Price Guide: ISBN 9780913902165 (978-0-913902-16-5)
    Softcover, Heart of America Press, 1976
• 
  Foreign Clock Identification & Price Guide
  

  by Roy Ehrhardt

  ISBN 9780913902868 (978-0-913902-86-8)
  Softcover, Heart of America Pr, 1995

  
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  • Foreign Clock Identification & Price Guide: ISBN 9780913902868 (978-0-913902-86-8)
    Softcover, Heart of America Pr, 1995
• 
  Foreign Clocks Identification and Price Guide: Book 4
  

  by Roy Ehrhardt

  ISBN 9780913902707 (978-0-913902-70-7)
  Softcover, Heart of America Pr, 1993

  
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  • Foreign Clocks Identification and Price Guide: Book 4: ISBN 9780913902707 (978-0-913902-70-7)
    Softcover, Heart of America Pr, 1993
• 
  Patek Philippe Parts & Materials Catalog Book
  

  by Roy Ehrhardt

  ISBN 9780913902998 (978-0-913902-99-8)
  Softcover, Heart of America Pr, 1997

  
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  • Patek Philippe Parts & Materials Catalog Book: ISBN 9780913902998 (978-0-913902-99-8)
    Softcover, Heart of America Pr, 1997
• 
  Patek Philippe: Wrist Watches, Pocket Watches, Clocks : Identification and Price Guide : Retail & Vintage Prices : Book 1
  

  by Roy Ehrhardt , Joe Demesy

  ISBN 9780913902608 (978-0-913902-60-8)
  Softcover, Heart of America Pr, 1991

  
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  • Patek Philippe: Wrist Watches, Pocket Watches, Clocks : Identification and Price Guide : Retail & Vintage Prices : Book 1: ISBN 9780913902608 (978-0-913902-60-8)
    Softcover, Heart of America Pr, 1991
• 
  Trade marks: Watch cases, pocket watches, precious stones, diamonds
  

  by Roy Ehrhardt

  ISBN 9780913902066 (978-0-913902-06-6)
  Softcover, Ehrhardt : [available from Heart to America Press], 1976

  
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  • Trade marks: Watch cases, pocket watches, precious stones, diamonds: ISBN 9780913902066 (978-0-913902-06-6)
    Softcover, Ehrhardt : [available from Heart to America Press], 1976
• 
  Vintage American and European Wrist Watch Price Guide
  

  by Roy Ehrhardt , Sherry L. Chrhardt, Joe Demesy

  ISBN 9780913902448 (978-0-913902-44-8)
  Softcover, Heart of America Pr, 2004

  
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  • Vintage American and European Wrist Watch Price Guide: ISBN 9780913902448 (978-0-913902-44-8)
    Softcover, Heart of America Pr, 2004
• 
  Violin Identification & Price Guide, Book 3
  

  by Roy Ehrhardt

  ISBN 9780913902257 (978-0-913902-25-7)
  Softcover, Heart of America Pr, 1978

  
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  • Violin Identification & Price Guide, Book 3: ISBN 9780913902257 (978-0-913902-25-7)
    Softcover, Heart of America Pr, 1978