15XX series in production for so long, it actually went through two calibers during its run. For the earliest handful of years, it was powered by the Cal. 1565, an improvement over the former Cal. 1565 was the first Rolex movement to be given the brands own Microstella regulating system, featuring weighted screws on the inner edge of the balance wheel which could be easily adjusted to increase or decrease its rate. It was effective enough to make its way onto every subsequent caliber Rolex made.1565 still had a fairly low balance frequency of 18,000vph, so in 1965, it was replaced by the faster Cal. This shared many of the same elements, but worked away at an uprated 19,800vph, ensuring not only a smoother travel for the seconds hand, but a better timekeeping accuracy and more shock protection as well. 1550 is a great example, with classic lines and a battle-hardened movement, it is versatile and reliable enough as an everyday companion, and with enough vintage nods to delight any collector. This 100% genuine example is a never polished, all original example with an excellent time keeping movement.
It has also been checked by our own jewellers for authenticity and reliability. You get exactly what you see on the photos. The watch comes with with an original vintage Rolex box (with very slightly hinge damage at the back of the box, still opens and closes - as seen on the photo). Personal inspections welcome with an appointment.
Model: Oyster Perpetual Date 1550. The item "Genuine Vintage Rolex Oyster Date 1550 (1973) Investment & Collectors Watch" is in sale since Tuesday, April 6, 2021. This item is in the category "Jewellery & Watches\Watches, Parts & Accessories\Watches\Wristwatches". The seller is "luxwiss" and is located in Ipswich. This item can be shipped worldwide.