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Antique Clocks/Shatz & Sohne speed adjustment

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Question
Schatz & Sohne 18/1
Schatz & Sohne 18/1  
My 14-year-old son recently bought a lantern clock with a Schatz & Sohne 18/1 movement.  It works fine except that it gains about 5 mins per day.  There is a metal plate at the top of the movement with - and + stamped on it.  How is this used to adjust the speed?

Answer
Schatz escapement
Schatz escapement  
This uses a platform balance escapement but the balance faces the front of the clock, you're seeing the back or base of the escapement. The adjustment lever is shown in the cicled area and is cocked over full fast. Move the lever gradually back toward center, checking the time over 24 hrs. after each adjustment.

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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.

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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