The Armin Strom resonce has been around for a good year about now. Not many watchmakers have taken on the principle of resonance, I recall Francois-Paul Journe did a while ago.
Armin Strom tried to honor its skeleton watch for which they are known while implementing the resonance.
This is the latest piece, either in steel or rosegold, sized at 42mm with a height of 12mm. The movement is obviously inhouse and developed by Armin Strom. Powerreserve is two full days. Prices range from 49000 CHF (Swiss Francs) to 62000 CHF.