Mach
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Some live pictures of Hublot’s Big Bang 20th Anniversary pieces . . .
The newly relocated Hublot Boutique on 5th Avenue had three of these novelties - the King Gold Ceramic, the Titanium Ceramic, and the All Black:

These come in a 43mm case diameter with a thickness of 13.2mm - the All Black:

My personal favorite of these three - the Titanium Ceramic: