VCXO Ox One “Magic Button” Mechanical Watch With GPS Time Synchronization VCXO by wholesalewatches - July 24, 20170 The VCXO Ox One is a bold new concept from a young Geneva-based brand which offers a rather unique bond between GPS technology and mechanical movements. While the accuracy of GPS-set quartz watches is universally acknowledged, most watch enthusiasts will agree mechanical watches tend to have more soul, thanks to their "beating heart,"