A Beautiful & Rare example of Rolex 1655 Mk5 "Freccione" Full set and complete with the authenticity papers from Rolex The ref. 1655 was powered by the 26-jewel Calibre 1575 GMT, the same movement as in the ref. 1675 GMT-Master. A modified base Calibre 1570 movement, the Calibre 1575 had a date feature and logically the Calibre 1575 GMT had the additional 24-hour hand. The movement was automatic, had the hacking-seconds feature (where the seconds hand stops when the winding crown is full pulled out to adjust the time) and boasted a 48-hour power reserve. This chronometer-rated movement was housed in a 39mm stainless-steel case with crown guards and the watch had a fixed, non-rotating, bezel with 24-hour markings; even numbers in Arabic numerals and odd numbers represented with hash markers. Designed for speleologists and potholers, the watch allowed the adventurers to keep a track of time and whether it was am or pm via the large luminous 24-hour hand. A specialist application for sure, but also useful for those who spent large amounts of time away from natural daylight. It would also prove useful for explorers in continents where there were periods of constant daylight or darkness.