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Clocks, Watches/jauch 77100m movement weights


hello john,i was wondering why the weights for the jauch 77 100m movements are 4.4 to 4.7.the manual i got with the clock says they should be the 4.4 to 4.7 just the iron fillers or is the manual wrong.i know you said the shells on the manual are wrong,diameter should be 1 ,7/8 not 1 3/4.just wondering if the 5.5 on manual is wrong to.  thanks again milt.

Hi, Milt.  First, do you have a copy of my saying that the weight shells were wrong?  I have seen both used for the same movement and I could have been referring to a question in which the weight fillers would not fit in the shells.  As far as the difference in weights, I'm not sure which clock company's manual has this information, but there were a couple of different weight values given in the Emperor manuals.  For the Jauch 77 movement, values of 4.4# and 4.7# were used at different times.  I do recall that 5.5# has been used at some time, but am not sure when.  I will have to check to see if any of the vintage Emperor manuals show that value for all three weights.  One of the reasons parts do vary with some similar models of clocks is that the suppliers to the manufacturers would change their product specifications.  While I was at Emperor, we used the 4.4# or the 4.7# for all three weights.  These worked reliably with new movements and those that had been serviced regularly.  Adding more weight will cause the parts to wear prematurely.  How much is hard to tell.  Somewhere around the mid-1980's, Emperor changed from the Jauch 77 (Emperor 100M) to the Hermle 451 (Emperor 101M), and the required weight for the chime function was 6.6#.  So the strike and time weights were either 4.4# or 4.7# and the chime weight was 6.6#.  I don't know the situation with your clock, but if the weights you have are working reliably, I would just leave them that way.  One reason is that the Jauch 77 has a history of premature wear, which usually first appears in the chime function.  If you do have a 5.5# weight and changed to one of the lesser weights, it possibly might not be able to overcome the built up wear and it would fail.  Another situation is that some inexperienced clockmakers run into a reliability problem and think the solution is to add more weight.  This works for a while, but accelerates the wear and will sometimes ruin a movement that could be restored for a reasonable fee.

John Newman
The Village Clocksmith
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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