WS800 Understanding Fundamentals of Clocks for Valuation

WS800 Understanding Fundamentals of Clocks for Valuation

The National Association of Watch and Clock Collectors Inc. will offer their clock evaluation course October 19 - 24, 2019 at the NAWCC, 514 Poplar Street, Columbia, PA 17512.

The course is designed to provide appraisers, auctioneers, collectors and anyone interested in horology with a professional five-and-a-half-day program to enable them to properly identify the wide range of clock styles and to learn techniques to determine their value. Recognition of certain traits and subtle characteristics that affect value will be a prime consideration to avoid costly errors in the sales room, appraisal report, or personal collection.  Basic mechanics will also be covered to enable the participants to recognize proper function and how defects, modifications, and repairs impact value.

The course will use the facilities and resources of the NAWCC Inc., the National Watch & Clock Museum, and the Library & Research Center.  The NAWCC is the world’s largest museum, research library, and international community dedicated to clocks, watches, time, and timekeeping. There will be behind-the-scenes tours of both. The Museum staff and Dr. Jabbour will assist the students with research projects using the Library’s vast archives and horological material.

There will be reading assignments both before and during the course, quizzes, a final exam, and graded research projects. A Certificate of Completion will be given to students who successfully complete the course and pass the exams.  That certificate has been used in the past as part of the ISA’s specialization designation.

Guest lecturer Leon Castner is a Certified Instructor of the Uniform Standards of Professional Appraisal Practice. He is Senior Partner at the appraisal firm National Appraisal Consultants, LLC and has lifelong experience as an auctioneer, professor, and appraiser.

He is certified with a CAPP by the International Society of Appraisers and has been a certified member of the Appraiser’s Association of America. He is a former chair of The Foundation for Appraisal Education and former director of Education at ISA. He has written hundreds of appraisal articles, edited core course manuals and texts, and is a co-host of the nationally syndicated radio show “Value This with Brian and Leon.” His entertaining and proficient style of teaching will be apparent, making learning both painless and enjoyable


The course was originally developed and taught by Joe “JC” Cohen, Silver Star Fellow of the NAWCC.  JC has handed over the instruction of the course to International Society of Appraisers member Joseph M. Jabbour, M.D., who is a former student of the class, a retired plastic surgeon, and is an appraiser of clocks and watches in the DC Metro area. A syllabus will be used and provided to participants in book form along with 3 additional horological research books in digital format. Additional information and requirements for the course will be provided at preregistration.

Workshop Fee
NAWCC Member:

$900 Early Bird (before 9/19/2019)
$1,350 Regular

Non Member
$1,000 Early Bird (before 9/19/2019)
$1,350 Regular

For additional information and to register, please contact the NAWCC Education Coordinator at

10/19/2019 - 10/24/2019
514 Poplar Steet Columbia, PA 17512
Online registration not available.

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