On a 78350/557 Oyster bracelet
They were a decade marked not only by advances in technology
the Swiss manufacture kept their nose to the grindstone
it's rumored that some of these watches were fitted with a decompression bezel (notable for the accents of red at 12 o'clock and 3 o'clock)
Super Luminova indices and hands for low-light visibility
Patek Philippe Perpetual Calendar 'Tiffany' Storage On a 78350/557 Oyster braceletA perpetual calendar is like a small computer on your wrist. Think of it this way: Imagine a watch that keeps track of not only the time, but also the date, the day of the week, and the month, and also tells you whether its a leap year or not, and what the current phase of the moon is. Oh, and one more thing imagine it does all of this mechanically, using springs and gears, and that you only have to adjust it once every century or so. Crazy, right?