Koma Mini

RexHavoc

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Dec 29, 2021
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I'm new here and new to attempting torsion spring repair on an Anniversary clock. I've got a Koma Mini but can not find any indication of a model on it. I'd love to find out. Also, I need a torsion spring and pendulum block for it. Suggestions would be
welcomed and appreciated! - Thanks -


8B63A72B-A78A-4614-AC11-854128AF4A47.jpeg B7276FDD-2BC0-46E8-A655-F3D1ED97B1FC.jpeg
 
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Schatznut

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I'm new here and new to attempting torsion spring repair on an Anniversary clock. I've got a Koma Mini but can not find any indication of a model on it. I'd love to find out. Also, I need a torsion spring and pendulum block for it. Suggestions would be
welcomed and appreciated! - Thanks -


View attachment 687424 View attachment 687425
Welcome to the forums, Rex! If you'll post a close-up photo of the back plate, we'll be able to tell you all about it, including what size suspension spring it will need.
 

etmb61

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It's a "Boy"!
PD_0074.JPG

All of Koma's small clocks are! Yours is closer to No. 1052 but I don't have that page scanned. The dial and the top case finials are different.

Plate 1393C, 0.0022" spring, unit 38 or 38A. Looks like you are missing some parts to the pendulum locking mechanism.

Eric
 
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RexHavoc

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Dec 29, 2021
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It's a "Boy"!
View attachment 687426

All of Koma's small clocks are! Yours is closer to No. 1052 but I don't have that page scanned. The dial and the top case finials are different.

Plate 1393C, 0.0022" spring, unit 38 or 38A. Looks like you are missing some parts to the pendulum locking mechanism.

Eric
Thanks all. Here are more photos. I’ve got the movement out of the case as I’m trying to clean it up, a bit. (The case) There does appear to be a bit of the original torsion spring in there. . . (Not sure how / if the top corner posts come off. It would make things much easier!) (Also, sorry for the delay, internet issues, sigh.) 07BCDE0F-6AC2-4A47-AE5A-70464B0602C1.jpeg 603DC06E-8BE9-4EA1-BE3B-B77A83BDF8F4.jpeg
 

RexHavoc

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Dec 29, 2021
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It's a "Boy"!
View attachment 687426

All of Koma's small clocks are! Yours is closer to No. 1052 but I don't have that page scanned. The dial and the top case finials are different.

Plate 1393C, 0.0022" spring, unit 38 or 38A. Looks like you are missing some parts to the pendulum locking mechanism.

Eric
Eric -
I noticed the missing locking mechanism parts, too. Not sure what to do about that.
 

KurtinSA

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You might contact the Horolovar Store at some point and tell them what you have and don't have. They might have some replacement parts on their shelves.

Kurt
 
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Burkhard Rasch

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I see at least remnants of the SS in the SS-guard , take it off and You´ll certainly find the top block and fork. The clock will run without the pendulum locking device allthough it is nice to have the clock complete!
Burkhard
 
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RexHavoc

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Thank you for the comments. Yes, here is the bottom of the clock. (Not cleaned up, yet) I’m guessing the locking mechanism screws into this.
2CBEDE92-5CD2-45D1-8F42-1B44E1CF1110.jpeg E44F306A-1017-4573-8483-0E8FFA9750BB.jpeg
 

RexHavoc

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Dec 29, 2021
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E7EBB3D8-D52E-4E4B-ABD4-FBBFA3DF025A.jpeg Thanks for all the help on getting the parts for this clock. I, finally, got it back together today. New torsional spring and pendulum ‘lock’. Of course, I didn’t bother to check the clock, itself, and now discover it’s over wound and doesn’t want to run. Sigh.
 

Schatznut

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That's a cute little clock! Regarding "overwound", there really isn't such a thing. When fully wound a spring makes maximum power unless the spring lube has turned to glue and is creating "stiction" between the individual coils. If the clock doesn't run, most likely it's losing too much power to friction or obstruction, and/or the escapement is not doing its job. After you replaced the torsion spring, did you set the beat? That's the first thing to do. If that doesn't get it going, it will need a complete overhaul and mainspring service. The mantra here is that if you don't know the last time a clock was serviced, it needs it.
 

Burkhard Rasch

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Schatznut is right of cause , and before dismanteling the movement , the mainspring has to be let down. Servicing these is not witchwork , come back with questons if You start to do it on Your own!
Burkhard
 

RexHavoc

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Dec 29, 2021
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That's a cute little clock! Regarding "overwound", there really isn't such a thing. When fully wound a spring makes maximum power unless the spring lube has turned to glue and is creating "stiction" between the individual coils. If the clock doesn't run, most likely it's losing too much power to friction or obstruction, and/or the escapement is not doing its job. After you replaced the torsion spring, did you set the beat? That's the first thing to do. If that doesn't get it going, it will need a complete overhaul and mainspring service. The mantra here is that if you don't know the last time a clock was serviced, it needs it.
I have not ‘set the beat’ which could be an issue. I will need instruction! (Sigh, sorry!) I do know that I’ll need to gently relieve the pressure on the main spring before any possible clock works work. It is sitting across the room from me with ‘that look’ when are you going to finish fixing me!
 

RexHavoc

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Dec 29, 2021
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It. Is possible it needs a little more. I have adjusted the ‘beat’ on another anniversary clock, so I do know what it is, now! However, the escapement isn’t, um, escaping! Still need to give it a closer look.
 

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