Rolex ref 6305 (from Q1, 1955) big bubbleback 勞力士大泡泡背

This afternoon, after lunch, I have decided to walk by and take a quicvk look at my favourite vintage watch shop and saw a watch that looks like a 1601. Upon clower examination, I then realised that it is a 6305, which is a big Bubbleback ref 6305 from Q1 1955. 

The Rolex Datejust in stainless steel remains to be one of the most popular vintage watch requests we get on a daily basis, and we can see why. It’s beautifully designed and completely wearable in any setting without being ostentatious. The Rolex 6305 was in production from 1953-56 before being replaced by ref 6604, 6605 using the Rolex Buttlefly movements cal 1030. etc

Much of the design ethos remains the same for the Datejust since its debut in 1945. Rolex patented the Cyclops in early 1953, and featured it on the Datejust. This curved lens, put on the crystal at 3 o'clock (or at 9 o'clock in the case of GMT Master II) above the window, made viewing the date easier. This Datejust ref. 6305 from 1955 Q1, is especially charming, as it still has an overall hybrid feel between the Rolex Bubbleback and Datejust models. 

The case measures 36mm, which is a universally appealing size for modern wear for both men and women This particular watch is even more special because of its dial. It bears the so-called OCC inscription ("OFFICIALLY CERTIFIED CHRONOMETER"), which can only be found on early Rolex specimens. In addition, the dial features an alternating black and red date disc and is one of the very first roulette dials in watchmaking history.
This Datejust still features an old finely fluted coin edged bezel gives it some extra pizazz. In the mid-1950s, the changeover to the wide fluted bezel took place. Thus, this Datejust is one of the last watches with this super-elegant and fine bezel. The best part of this watch is definitely the dial as it still retains its clean look. 

Using A296 Semib bubbleback movement

The Rolex Big bubbleback series leading to the Datejust consists of the following 

Rolex ref 4467 (solid Gold from year 1945-1949)  
Rolex ref 5030 (Solid gold) , Bi colour steel and gold 5031, 5075, 6031 (from year 1949 - 1950)，
Rolex ref 6075, 6074 (Bi colour from year 1950 - 1953) also some 1960-64
Rolex 6104, 6105 (Bi colour modified A296，from year 1951 - 1953) some from the 1960s
Rolex 6304 , 6305, 6309 (Pre ThunderBird) (A296，from year 1953 - 1956)
Rolex Datejust 6604, 6605, 6609 (Thunderbird), 1600, 1601,1603, 1607, 1625 (Thunderbird) (from 1959 - 1977 onwards using Butterfly movement calibre generation features cal. 1065 and later cal. 1565 and 1575.)