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Clocks, Watches/Hermle 351-050H movement


Hermle 351-050H
Hermle 351-050H  
I have a clockmovement Im trying to repair for the wife.  All pics and info I have found on the 351-050H is different from mine.  I have a unit that has a triangular shaped attachment that holds the suspension spring.  My question is, what is the correct suspension spring, and how does it attach to the arm?  Mine has a pin through the arm, which I think is wrong, as everything I have found (pics) show a thumbscrew.
  What would be the correct set up for this unit


Kevin, I was surprised to see your question appear today, as I had answered it a couple of days ago.  Evidently something happened when I sent it and it didn't go through.  

We don't see a lot of the 351's, as it is a spring driven model with the chime and strike hammers on the top.  What I had said was that you have a later version "high bridge" Hermle 351-050H.  The "H" designates the high bridge.  I also asked you to measure the top block of the suspension spring (height and width), as there was a time where they changed the size of the suspension spring.  If you will send me those dimension, I can probably determine the correct one.  And as far as the pin or screw, it doesn't make any difference in the running of the clock as long as it is secure.  Pins have been used for centuries to hold suspension springs on clocks.  It there was a screw in it originally, it could be that the pin has damaged the threads to the point that another screw would not go in properly, so I would just use the pin that is in it now.  Let me know what you find and we'll see what we can do.  You can reply to my clock shop email address below and we can exchange fore pictures and details if necessary.  Sorry for the delay in my answer.

John Newman
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.  

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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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