Constant force revisited.
At Phillips' Hong Kong watch auction.
The most complicated watch ever, from a maker of very complex watches.
Inside the Différentiel d’Égalité wristwatch.
Another step towards a mechanical movement with a 180-day power reserve.
Proceeds from the sale of both watches will go to Kidz Horizon Appeal in Singapore.
A simple wristwatch with elaborate finishing, and hints of the brand's tourbillons in its design.
A grande sonnerie wristwatch, top secret 180-day power reserve, and more variant of the entry-level timepieces.
The entry-level - relatively speaking - Greubel Forsey wristwatch gets a platinum case.
The second instalment of the Art Piece 2 conceals the time but makes up for it with an oversized power reserve display.