Rolex Watch ♛ Oyster Zephyr 6582 cal.1030 Steel/Gold 14k Automatic Chronometer 1956

This 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. 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 “ROLEXPERPETUAL”, 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.