![]() ![]() However, ask any watchmaker today what in their opinion is the best movement Rolex ever produced, and many will still say the Cal. ![]() Instead, Rolex fitted the movement into several of their non-chronometer models, such as the Air-King and the earliest versions of the Submariner, watches they initially deemed not to need mechanisms that had passed the rigorous COSC tests. Therefore very few were submitted for chronometer certification. While extremely precise and reliable, they considered the Caliber 1530 very much a workhorse caliber. Also, they replaced the brass colored gears with the red, Teflon-coated variety we generally see today. Its initial butterfly rotor graduated to the familiar half-moon type. Joining the first iteration, they also released it in 25 and 26 jewel versions. Additionally, it went through a number of significant upgrades itself during its successful run before retiring in 1965. Rolex originally launched it as a 17-jewel movement. There was a host of new technology that still had to prove its worth out in the real world. This explained Rolex’s tiptoeing approach towards its introduction. The Rolex Caliber 1530Īs a movement, the 1530 represented a major reworking on its predecessor. It was the base caliber upon which the rest of the range would be founded. The Rolex Caliber 1530 was the first of the new wave. ![]() They introduced Rolex Caliber 15 into this new wave. These ran concurrently with the previous mechanisms in several models. Rather than launching the 1500 series in a great sweeping confusion across the board, they phased them in gradually over a number of years. These were the first family of movements created entirely in-house by the manufacturer. ![]() In 1957, Rolex set about replacing their 1000 series of calibers. ![]()
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