You are here:

Clocks, Watches/Seth Thomas 3 5/8 movement


Hi John, your expertise has helped me greatly in the past so once again I seek your opinion. I just replaced both mainsprings in this movement and tried to mark reference points before dismantling.This is my first attempt with a chiming track and both mainsprings.With everything back in cleaned and oiled here is what I have. Runs,time track is moving,in beat and chiming on the hour as before. Adjusted the hammer strike to a nice tone on the hour. The half hour lifts the hammer up and drops but doesn't drop down far enough to strike the gong. If I adjust this to strike faintly then the hour strike is too hard and heavily muted.I'm not sure which cam I have a problem with so any advise is greatly appreciated.Best regards, Tony.

Tony, I apologize for the delay in my answer.  There seems to be a glitch in my answers getting through, as I answered your question yesterday and it has appeared again.  So maybe you didn't get it.

There are different types of strike/half hour strike arrangements.  I cannot immediately find the book that might have that movement in it.  However, I believe the cam or wire on the centershaft trips both the lever for the warning and strike of the hour and also the half hour lift and drop.  The hour strike is started by the trip, and the actual hour strike is actuated by the pins on the strike wheel.  The half hour is actuated by the cam or wire on the centershaft.  If you can send a clear photo of the strike trip arrangement, I might be able to visualize what is happening.  My shop email address is below. In the meantime I will continue to look for the book.

John Newman
The Village Clocksmith
Old Prattvillage
Prattville, Alabama

Note concerning questions not related to Allexperts:  Because of my commitment to answering Allexperts questions within a prescribed time limit and the large backlog of clock work at my shop, I regret that I cannot answer personal email questions on a timely basis, other than Allexperts follow up questions.  I will try to answer these emails as soon as I can. Thank you for your patience.

Clocks, Watches

All Answers

Answers by Expert:

Ask Experts


John Newman


As I am not a certified appraiser I do not give values of clocks over the Internet. There is very little published information on what I consider to be the value of "modern production clocks". However, considerations are what the clock originally sold for, the condition of the case and movement, and particularly the area in which you live, the demand and the economy. ALSO, WATCHES ARE NOT MY FIELD. However, I can advise the clock owner on proper maintenance of a clock to keep it running, small corrections and adjustments and how to move a clock without damaging it. I can also advise on obtaining parts for clocks. As clock case model label numbers are difficult to relate to the movements, it is helpful if you can give me the information usually found on the movements themselves. Modern clock movements usually have the information on the back plate of the movement. I have been a clockmaker for about 40 years and was plant engineer in the mid 90's and later operations and engineering consultant at Emperor Clock Company in Fairhope, Alabama. I now have my own clock shop in Prattville, Alabama.


One of my greatest accomplishments was traveling to China to assist a clock factory in building clocks to the standards which we required at Emperor. With the proper specifications and quality control, some beautiful clock cases were built. The factory people from the wood carvers to the plant manager were very congenial, friendly and I left a lot of wonderful friends when I returned from my trips.

NAWCC (National Association of Watch and Clock Collectors) 30 years Prattville, Alabama Chamber of Commerce

Horological Times, a publication of the American Watch and Clockmakers Instute. Collaberated column author, with Photos and ideas for clock movement conversion article.

Associate of Science Mechanical Engineering Technology Emperor Introductory Clock Repair (Eventually taught a portion of the class after becoming employee)

Awards and Honors
Small Business of the Quarter (Prattville, Alabama) Leadership Class of 2009 (Autauga County, Alabama)

©2017 All rights reserved.