As Piaget is known to do, this watch not only sets a record for thinnest chronograph, but also for the watch itself, which is only 8.24 mm thick. But what is perhaps most interesting about this watch is that Piaget chose not to stop with a chronograph, also adding a second timezone. Yes, that register at 9 o’clock is actually a GMT dial, meaning that this is a 30-minute chronograph, with running seconds, and second timezone.