Fifth in a long line of such complications the Geneva house (it is preceeded by the refs. 1518, 2499, 3970, 5970), but it is the first entirely in-house model of this complication – that is in itself a sign of how the industry has changed.
It utilises the CH29 calibre, first seen in the 5170J, with the addition of a calendar module, making it the CH 29-535 PS Q.
|The Patek Philippe CH29|
The case is in white gold only for now. It measures 41 mm in diameter, one mm wider than the 5970 it replaces.
Like the rest of the Patek Grande Complications it is presented with two casebacks, one solid and the other sapphire. In practice that means the watch is sold with the sapphire case back and the solid back remains sealed in the factory pack.