Rolex 50's Genuine James Bond 8mm Big Crown 6538, 6536, 5508 Automatic cal, movement cal.1030

 This is a 50's Rolex complete automatic 1030 preowned movement in James Bond Submariner & Explorer mens sports models.

History ...

In 1956, ROLEX unveiled the SUBMARINER 6536 & 6538, found both with the A296 caliber, with the caliber 1030 (bidirectional winding rotor).

The first version of 6538 still has a rounded bottom of the Bubble-back guy. The second version of 6538 is distinguished by its more imposing case and winding crown 8 mm in diameter, as well as its new caliber 1030.

-This model is called 6538A.

The triangle of the bezel may be red (as in English 6200), with maximum depth of 660 feet / 200 meters against 330 feet / 100 meters for 6536.

-Models with the caliber 1030 have their own reference: 6536-1 .

Adopting the Rolex watch automatic caliber 1030 provides better accuracy and from the end of 1958 we begin to find certified chronometer 6538, on the dial inscription OFFICIALLY CERTIFIED CHRONOMETER.

his is the quite older Rolex movement in Rolex history. Cal.1030 produced in 1950 is the first bi-directional automatic winding movement made by Rolex at that time.

Adjusted to five positions, during that period without concept of COSC, adjusted to five positions is already somehow equal standard with COSC.

Worthy of mentioning that before Cal.1030, there is another Rolex movement Cal.1000, but info. or record even can’t be found at Rolex’s database. Just like Cal.1000, Cal.1030 was the most popular 18000vph movement at the time as well as use of mono-metallic compensation balance and blue steel Breguet overcoil hairspring.

Cal.1030 also features an unique rotor which is totally different with today’s, two prongs are hollowed on semi-circle, around the outer race engraved with word of “ROLEX PERPETUAL”, beneath is the word of “PATENTED” and the iconic patter of Rolex crown.

By removing the rotor and upper plate, two big ratchet wheels are revealed, above Balance Bridge, is the noticeable regulator for adjustment.

Most noted Rolex model equipped with this movement is Oyster Perpetual model Ref.6564 launched in 1956.

These models usually have indicators for hours and inscriptions in gold (indicating deep and white clock), they remained in production throughout 1960.

Fits on Rolex watches models sports mens :

6500, 6538, 6536, 6505, 6532, 6540, 6583, 6584, 6585, 6587, 6589, 6590, 6592, 6593, 6593, 6594, 6598, 6599, 6610, 6614, 6634, 6565..

This Rolex movement is complete and correct condition.

ITEM DESCRIPTION :

Rolex vintage 50's Automatic Rolex caliber ref #1030 for sale.

Technical datas :

Cal.1030

Automatic winding

Diameter: 28.5mm

Height: 5.85mm

Jewel No.: 25

Compensation balance

Frequency: 18800vph

Adjusted to five positions

Butterfly oscillating weight stampded ROLEX PERPETUAL PATENDED

Registered ROLEX PATENDED 1030

Ø28mmouter diameter

No rusty or distorsions, but sold as it / Need a service.

If you have any questions or need more pictures please email us.

Rare to find, discontinued.

 GUARANTEED TO BE 1OO% AUTHENTIC