MWC Classic 1950s/1960s Pattern 25 Jewel Automatic "Adventurer" Watch with 200m Water Resistance and Retro Luminous Paint and Sapphire CrystalSKU Code: RE25J 54 This watch is based on a 1950s 1960s pattern exploration and adventurer watch. It features a box sapphire crystal that closely resembles the original plexiglass crystal. The movement is a Ronda R 150 or equivalent, a sophisticated 25 jewel automatic movement with an impressive frequency of 28,800 vibrations per hour (4Hz). This precision crafted mechanism boasts a substantial 38 hour power reserve, ensuring enduring performance.