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Clocks, Watches/Rhythm Mantel Clock (Japan) with chiming problem


This clock chimes correctly from 12 to 6 but from 7 to 11 it has one extra chime.

This is a Rhythm (Japan) Mantel model with Hour Strike Transistor. (Battery operated). The timber housing suggests a production model from the 60's. There is no model number. The only controls are Chime on/off button, time adjust control, and a speed increase/decrease (5sec/24hr) adjust control. Do you have any suggestions as to the cause?

ANSWER: Hi, Richard.  Wow! A Rhythm clock from the 1960's.  I would say that is rather rare.  In my opinion you have gotten a lot of use from that clock.  Most of these quartz movements are considered throwaway products, and there is very little documentation for parts and diagnostics for these units.  It sounds like there is a mechanical trip point that is failing during the hours you mention. I don't think it would be an electronic circuit problem.  My suggestion would be to replace the movement with a new unit.  If you will send a clear photo of the front of the clock and one of the back of the movement I will try to find a suitable model and a supplier for it.  I will need a little more information, so if you will reply to my shop email address below with the photos, I can get back with you.

John Newman
Located in Old Prattvillage
Prattville, Alabama

Due to my commitment of answering Allexperts questions in a timely manner and the workload at my shop, I regret that I cannont answer personal emails except from Allexperts follow-up questions in a timely manner.   

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QUESTION: Thanks John. I am in Australia so I am sure of you sourcing a replacement part. But I have look at the mechanics. Happy to post a photo for old time sake.


Richard, normally I don't recommend repairing these, but because of your location, I have sent an inquiry to see if any of the members of my Internet Clocksmiths group would have any suggestions for diagnostics and repair.  I would still like to see the photos to pass on for additional information.  

John Newman
Located in Old Prattvillage
Prattville, Alabama  

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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)

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