Case material: Yellow gold; Charge: Manual; Conditions: New Presentation condition : With boxes and all papers; Model: CHRONO COMPLICATION Price on request Gmtbroker Reference: 5170J-001 super exclusive & extremely rare patek philippe chronograph ref. 5170j - the genesis of a new classic this new classic column-wheel chronograph movement comes in a yellow gold case with rectangular pushers reminiscent of patek philippe's famous 1940s and 1950s wrist chronographs. the ref. 5170 is a mechanical chronograph in the best tradition. it embodies the new ch 29-535 movement, a caliber developed and crafted according to the criteria of the patek philippe seal . it takes audacity to call a unworn watch a classic, but in the case of the patek philippe chronograph ref. 5170j, the attribute is justified. although it debuts at basel world 2010, it has already been at the top of the wish list of many collectors and aficionados for many years ?€“ and a popular topic among specialized publications. now, the time for speculation is over and the object of desire has become reality: the classic men's wrist chronograph developed entirely by patek philippe and crafted exclusively in the manufacture's workshops. all good things take time. and if it has to be perfect, it might take some more time. after all, the ambition with the new ch 29-535 ps chronograph caliber for the ref. 5170j was not just to present a classic manually wound chronograph movement with a column wheel and a horizontal clutch built entirely in-house. the objective was also to outperform its predecessor, the c