skyeriding
900
The clickspring is integrated inside the crown wheel itself - just barely visible in the last photo.
May 20, 2020,03:01 AM
Two clicks are fixed to the inner ring of the crown wheel, which both interact with a fixed star wheel/ratchet hub.
The hub itself can freely rotate slightly, as it has two radial track/grooves. This allows for the "slack" to prevent overwind of the mainspring at its fully-wound limit, just like a regular clickspring.
Keaton himself had once admitted, on Instagram, that during disassembly/servicing, relieving the mainspring power with such a setup is tricky, and he needed to make a special tool to allow for it. This is because when you consider that the clicks are mounted onto the crown wheel, so the clicks will continuously rotate together with it as the mainspring unwinds!
Regards,
skyeriding