B012B – “SPACE TRAVELLER” series –Mat Black Dialedition is a mechanical wristwatch we have developed base on the inspiration from the revolution of planets. From which a MiyotaCal.9015automatic movement (one of the most stable and reliable mechanical movement in the market) has been used as a base for power source and then we installed a mechanical module which we have designed, developed, and constructed completely in-house based on a satellite system (for satellite time display function).