The Horolovar 400 Day Clock Repair Guide specifies a 0.0023 inch thick suspension spring for the Schatz model 53 miniature movement. I just repaired one that ran too slow with a 0.0023 inch spring, so I installed a 0.0024 and it keeps good time (my repair job no. 5212). The pendulum looks normal, but perhaps its weight is slightly different?
I repaired another one a couple of months ago (job 5113) that also needed a 0.0024 inch thick spring. This one was slightly different in that the spring needed to be 1/8 inch longer than usual for the pendulum locking device to work.
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I recommend the Horolovar 0.0024 inch thick spring for this clock. The following place sells them:
http://www.norkro.com/webpages/400day.htm
(Most sources say to use a 0.0023, but in my exprience, the .0024 works better).
I need a suspension spring for my schatz 400 day anniversary clock. What size do you recommend? It has a 54 stamped on backside. Do I also need a key. This is my wife’s grandparents clock and I am trying to make it work again.
Thank you.
Just did another one that needed a .0024 inch suspension spring. BP 1013, dated 7-55. Repair job 5302.