Clocks, Watches/clock key

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Question
QUESTION: I HAVE A 31 DAY KASSEL SCHOOL HOUSE CLOCK - APPROX 20-24" HIGH, APPROX 20 YRS OLD WHICH I LOST THE KEY.  CAN YOU TELL ME WHAT SIZE THE KEY IS.  THANK YOU.

ANSWER: I believe these movements take a #10 size (4.4 mm).

---------- FOLLOW-UP ----------

QUESTION: I measured the key hole - it is 1/2"  The small pin inside is 1/4".  Would this be a number 10 key -- 4 mm?  Thank you.

Answer
That's not possible. You have to measure the winding post with accurate calipers, a ruler won't do. Clock key sizes only vary by fractional measurements. A 0.25"(6.35 mm) would require a #20 size key. Clock winding keys only go up to #16. You have to go to a Grandfather clock winding crank for a size #20. Kassel clocks are made in China and the Chinese movements take a size #10.
http://timesavers.com/catalogmain2.asp?GroupID=175&Level=4&ProdID=10050
I know for a fact the Timesavers #10 fits. Can't be sure about other suppliers unless you specified 4.4mm. Check for small print under the "6" on the dial. If it says made in China, order #10. If it says made in Korea, order #7. Chinese movements are 15 day, Korean are 31 day but I've never seen a Korean made Kassel, hence the clarification.

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Steve Guthrie C.C.

Expertise

A.W.C.I. Certified Clockmaker with 35 years of experience. I can answer clock repair or maintenance related questions. Please don't expect answers advising the use of bubble gum, bailing wire or WD-40. I only give advice that is meant to preserve your clock in the best possible condition, not make it worse. No questions regarding clock value or identification. I am not a collector and cannot do valuations. Visit my website at: http://www.arlingtonclockrepair.com/

Experience

Clock repairman in the north Texas area for 35 years. Certification as a Clockmaker through the AWCI since 1986.

Organizations
A.W.C.I.

Publications
I was featured in an article by the Watch&Clock Review regarding my restoration of a tower clock for the Wise County courthouse in Decatur, Tx.

Education/Credentials
Certification as a clockmaker with the American Watchmakers/Clockmakers Institute since 1986.

Past/Present Clients
General public,Six Flags Over Texas,Collin County,Tx.,Wise County,Tx.,Rapides Bank,Rapides Parrish,La.

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