The 5146J-001 has been a major part of the Patek collection since 2005. It has always been seen by Patek Philippe as their classic model for men with its pared-down legible dial with counters for day of the week month date moon phase display and power reserve indicator. Conveniently the hour and minute hands have applied luminescent material to facilitate use in low light situations. The 5146J-001 is part of the current range that is destined to be a future classic so much about the watch is 'pure' Patek Philippe. The 5146J-001 is what many Patek fans picture when they think of the annual calendar having a lacquered cream dial and being cased in yellow gold.