Watchmakers MB&F have unveiled their latest timepiece, the HM3 Frog Zr. The Zr in the name stands for Zirconium, and element much like Titanium, but only tougher. As MB&F proudly says, Zirconium is a key element in modern jet engines, allowing them to take on the high temperatures and stress. A watch isn’t ever likely to face the same setting as a jet engine, but having the same element does feed a sense of uniqueness, which is what this timepiece is all about. It has a black PVD zirconium skin, 22 carat purple gold for its rotors, and of course, the frog look we’ve come to love in MB&F watches. Only 18 pieces of the timepiece will be made available for retail.