Jeffrey Lock


Colonial Instruments
Tallmadge, OH
Toured In
12, 14

Jeffrey Lock has been involved in the field of antique restoration for 35 years. During the last 10 years he has specialized in antique surveying instruments from the 17th and 18th centuries, and his expertise focuses on the individual, artistically crafted instruments of the American Colonial period. Jeffrey's love of fine craftsmanship has driven his quest to solve the mystery surrounding the creation of these beautiful and functional scientific tools.

In his restoration work, Jeffrey has been able to duplicate the methods and techniques used by Colonial instrument makers, including his study and mastery of reproducing the engraving styles of the 16th to 18th centuries. This perspective allows him to detail an instrument's originality and pinpoint later restorations by other craftsmen.

He has assisted many museum curators regarding the proper evaluation of the institution's collection of 18th-century surveying instruments. Most recently Jeffrey performed conservation work on important instruments from the collections of the American Philosophical Society in Philadelphia. He has also advised several prominent auction houses in evaluating notable instruments consigned for sale.

Jeffrey has given presentations and published many articles within this particular field, most of which can be accessed by visiting his Web site. He has completed extensive research at major institutions both in the United States and England and was a guest lecturer at Oxford University in the Masters Program on Scientific Instruments. Jeffrey is a member of the Scientific Instrument Society and the Surveyor's Historical Society.

ANTIQUES ROADSHOW is an antiques appraisal event and television production; we do not buy or sell objects, and conducting any business with an appraiser at the ANTIQUES ROADSHOW event is strictly forbidden.

If you decide to do business with an appraiser who has appeared on ANTIQUES ROADSHOW, please keep in mind these tips before consigning or selling an item:

  • Get more than one referral and check references
  • Get valuations of your item from more than once source
  • Compare options between different types of sellers, i.e., a dealer versus an auction house
  • If you are considering consigning an object for auction, be sure to inquire how the item will be priced, the size of the fee, and the expected amount of time the process may take. Find out what will happen if it doesn't sell.
  • Check the appraiser's professional associations (such as International Society of Appraisers, American Appraisers Association, National Auctioneers Association)
  • Consult an attorney before signing a contract
  • Whatever kind of transaction you decide to enter into, always get a detailed written receipt for your records

ANTIQUES ROADSHOW’s pool of experts are professionals with a wide range of experience in the antiques, fine art and collectibles community, and they are from a diverse background of auctioneers, dealers and appraisers.

All ROADSHOW appraisers are independent volunteers who donate their time and expertise to PBS and who pay their own expenses to be on the show. All business transactions are independent from ANTIQUES ROADSHOW.