Independent Watchmaking

Watches

Grönefeld 1941 Quadrivium: Price, Specs and a Sold-Out Tourbillon

The Grönefeld brothers gather a flying tourbillon, a 7.5-second remontoire, jumping seconds and a power reserve into one 40 mm…

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Independent Watchmaking

Grönefeld 1941 Quadrivium: Price, Specs and a Sold-Out Tourbillon