This 1957 Rolex Explorer ref. 5506 40-micron gold-plated Super Precision with stainless steel back vintage watch has a completely original honeycomb dial and Dauphine handset. This original dial is amazingly preserved. The case and Rolex winding crown display very clean condition. The caliber 1530 automatic movement was just cleaned and is accurately maintaining time. These were the Canadian version of the Explorer line produced alongside the sports models. These Rolex-Explorer dress watches were part of a series of watches produced starting in 1954 with other names like “Air-King,” “Metropolitan,” “Everest,” “Meritus,” and “Golden Egg.” The Air-King and Explorer were the two names which survived the marketing experiment.