The Hermle 1050 020 - Part 25 

Thank you for that "correction" at the end. I recently acquired a mantle clock with the exact same movement; cleaned and oiled it, and have been trying to adjust it losing time. Now I understand why I was doing wrong.

I'd like to add a little information that might help some viewers of your video. A person who is not a collector or otherwise very familiar with different clocks might have a Hermle movement that is very similar in that it has a balance wheel but doesn't have that little screw adjuster to regulate the timekeeping. The earlier versions of this movement had a balance wheel that was suspended vertically by a helical spring. You might think that the balance wheel would bounce around but in fact there is a very fine steel wire running through two jewels on the balance wheel shaft. While this type of balance was technically superior, it had two disadvantages. One was that it required great dexterity to change the timing rate. The other disadvantage is that is was more expensive to produce. Now to adjust the rate on that type of balance, you had to gently hold the balance wheel and move a lever that was on the balance wheel itself. This moved weights in and out to change the rate. Any person without fine manual dexterity who tries this will probably damage the mechanism. If you have that type of balance wheel I advise that you find other videos that refer to the adjustment od the "floating balance". Some videos might refer to the type of balance in this video as a floating balance, but that is incorrect. This is a simple balance wheel movement.

I just inherited a couple clocks with 1050-020 movements from my father. Really appreciate your videos on getting them calibrated. Thanks again 👍

Thanks for the info,helped me adjust my clock

Thanks for the info. I couldn't tell which screw that little diagram was intended for.

thank you very much for explaining this to me.

Thanks I'm going to try this, my clock is running slow about a minuet each day. Very helpful!

Thanks a lot. This'll be a big help.

Thank you for this info I have an older Bulova Westminster chime that I am trying to calibrate with a similar movement.

Thank you so much it worded😊

I noticed in the final video (24), that the clock struck the hours at around 2 minutes past the hour. How can you adjust it so that it chimes right on the hour at the 12 mark? Thanks!

My father was gifted a clock very similar to the one you featured here in this video. Well, he gifted it to me. YEAH! I then took it to a clock repair place that specialized in grandfather clocks and antiques. They were supposed to get it cleaned, because it hadn't been running for over a decade, which they did and they lubricated the gears and what not. My question is, after doing the adjustments you did in this video, the clock is running 7 to 8 minutes slow per day. I think I'm running out of adjustment. Is there anything else I should check or should I take it back to the clock shop?

I thought I'd somehow missed 24 episodes of a brand new series! Calm down, Ian, all is as it should be.

That help me a lot on a clock that I was trying to get it working

I have a 50+ year old Franz Hermle 340-020A movement. It runs fast 10-15 minutes a day. Would recommend replace, clean, or repair for this? Thank you.

my hermle mantle clock is around 1 sec per hour slow after adjustment by me. i measure it very precisely. as it windows down, it slows a bit more (toward the 5 to 7 day mark). is about 1 sec per hour as good as i will get OR should I keep at it? i am happy with it now, less than 2 mins per week. thats better than most rolex. thanks

So does turning the screw clockwise slow down or speed up?

I rewind the dial wrong way now clock running hours ahead the same one you are showing when turn to right is doing nothing please help

Hey ron disregard my previous comment i somehow missed this vid!

There ARE free video editors....