Patek Philippe debuts new gold ref. 5270J-001 permanent calendar chronograph Since the introduction of 2011, the Prattflip referee has been launched. 5270. The permanent calendar chronograph has always been the favorite of fans and watch lovers, so new gold ref will have no doubt. 5270J-001 has been commented in Roworth. A beautiful clean and classic design, a watched a series of complications, but maintains a very compact, new aesthetic of traditional gold watches. Watches have been designed in every precious metal option other than gold, so this classic elegant time is correct, and of course the time test of all luxury watch brands.