We've already told you that Tudor is now a true manufacture, making its own movement completely in-house. They announced this caliber, the MT5621, in a brand new, hyper-technical-looking watch called the North Flag, introduced here. Well guess what – they didn't stop there. Also receiving the in-house caliber is an old favorite from a few years back, the super diver and still the only titanium watch in the family – the Pelagos. Oh, and now it's available in blue!