Horological Meandering

Sjogren
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The Braun/GoS caliber

Thanks for the feedback! I'm glad you appreciate our work.

Martin Braun's movements caught my attention a couple of years ago and in addition to his complications, I also like his use of large balances and single-piece bridges. I met him during GTE last year and too the opportunity to discuss what I wanted to do, i.e. create a high-quality manufacture movement with damascus steel bridges. He was impressed with what I had done sofar and was enthusiastic about the idea of a collaboration. He then suggested to base the project on a new caliber of his that he was developing. This caliber feature many of his trademarks and patents but do not have a lot of complications. This suits GoS perfectly as we want to showcase the damascus steel on the dial. Together, we outlined the changes of his bridges to maximize the displayed steel and did a first prototype, based on another caliber, which was ready a year ago.

 As you can see on the pictures, the balance bridge and bridge are cut out from the same piece of solid handforged damascus steel. The caliber includes Martin Braun's HPE innovation in the use of Silicium in the escape mechanism. His design not only extend the service intervals but also increase the overall effectiveness compared to a conventional design.  This is one reasons to why the movement has a 72 hour power reserve. The indicator is placed on the backside of the movement, which is perfect for us since it does not disturb the dial side.

Here is a specification summary:
Diameter: 36 mm
Power reserve: 72 hours
BPH: 18.000 bph
Modern escapement: Silicon escape wheel and anchor

Additional features:
Power reserve indicator on back
Screwed glucydur balance wheel
All wheels in the movement polished according to Geneva seal hallmark
Cyclovente teeth on wheels

We have improved the damascus steel crown and have now what I consider the ideal size both in regard to estetics and functionality. The stainless damascus steel that we use in the new crowns is of a different type than in the case and reacts slightly different to etching. The result is that the friction is increased with a very smooth winding experience as a result.

 I hope this answers most of your questions.

Thanks
Patrik

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