Roy Ehrhardt
Books
- Proceedings of the Robert A. Welch Foundation Conferences on Chemical Research XVIII. Immunochemistry.
- Vintage American and European Wrist Watch Price Guide
- Pocket watch price guide
- Trade marks
- American pocket watch 1979 price indicator
- Cartier wrist & pocket watches, clocks
- Encyclopedia of old pocket knives
- Foreign Clock Price Guide
- Patek Philippe Parts & Materials Catalog Book
- Pocket watch price guide
- Price guide to Col. George E. Townsend's 4-books on American pocket watches
- Violin Identification & Price Guide, Book 3 (Violin Identification & Price Guide)
- Foreign Clock Identification and Price Guide
- Clock
- Hampden Watch Company
- American pocket watch encyclopedia and price guide
- Ehrhardt and Meggers Railroad Watches
- Encyclopedia of Pocket Knives/Books 1 and 2 With Price Guide
- Foreign Clocks Identification and Price Guide
- Pocket Watch Price Indicator, 1980
- Rockford Watch Company
- Encyclopedia and Price Guide to American Pocket Watches (Illinois)
- American Pocket Watches Identification and Price Guide
- Elgin Watch Company Grade and Serial Numbers
- Foreign and American pocket watch identification and price guide
- Modern Wrist Watch Price Guide Book 1
- Trade marks
- Violin Identification and Price Guide, Book 2
- American pocket watch 1977 price indicator
- American pocket watch identification and price guide
- F. Kroeber Clock Co
- Hamilton Serial Numbers and Production Figures With Price Guide
- Pocket Watch Inventory
- Violin Identification and Price Guide, Book 1 (Violin Identification & Price Guide)
- Clock identification and price guide
- Violin identification and price guide
Author data: Open Library