Audemars Piguet's Royal Oak RD#2 is the world's thinnest self-winding perpetual calendar. It is 6.3mm thick.

SIHH 2018: Royal Oak continues to fly flag for Audemars Piguet with RD#2

Le Brassus watchmaker thrills again with the world’s thinnest self-winding perpetual calendar

Topic |   SIHH 2018

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Audemars Piguet's Royal Oak RD#2 is the world's thinnest self-winding perpetual calendar. It is 6.3mm thick.
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