Err Buddies...these are perhaps the best years n milestones of great successes in the Rolex history...
spanning between 1931...n 1957...
• 1931 - Rolex introduced the revolutionary Perpetual Movement; self-winding mechanism that can be found in every automatic watch.
• 1933 - Malcolm Campbell becomes first male ROLEX Ambassador.
• 1933 - First Airborne Expedition to fly over Mount Everest is equipped with Rolex watches.
• 1944 - Hans Wilsdorf's wife passes away, and Hans Wilsdorf establishes the Hans Wilsdorf Foundation to which he left all of his shares in Rolex.
• 1945 - Rolex DateJust (First waterproof, self-winding chronometer wristwatch with the date in a magnifying window that automatically changes; also the introduction of the Jubilee bracelet to celebrate Rolex's 40th Anniversary also known as the Ruby Jubilee).
• 1946 The Tudor subsidiary is established.
• 1947 - Chuck Yeager is the first man to break the sound barrier while wearing his Rolex Oyster Perpetual he purchased himself.
• 1948 - Cyclops Magnifier Lens feature for easy viewing of the date developed for DateJust.
• 1953 - Sir Edmund Hillary and Tenzing Norgay conquer Mount Everest wearing Rolex Oyster Perpetuals, May 29th at 11:30am.
• 1953 - Jacques-Yves Cousteau films the documentary The Silent World in the Mediterranean wearing a Rolex Submariner prototype.
• 1953 - Rolex introduces Explorer wristwatch. Also the Turn-O-Graph was introduced as the first wristwatch with a rotating bezel.
• 1954 - Rolex formally introduces Submariner diving watch at Basel Fair Watch Trade Show in Switzerland.
• 1954 - Rolex Oyster Perpetual Lady-Date created, which was the first self-winding waterproof chronometer for ladies.
• 1954 - Rolex introduced the Milgauss Anti-magnetic watch for Scientists.
• 1955 - Royal Navy divers issued officially with Rolex Oyster Perpetual watches.
• 1955 - Rolex perfects the "Twinlock" crown which screws down onto the case and has internal sealing to give watch double protection.
• 1955 - Rolex introduces the GMT Master is developed for Pan American International Airlines to make it possible for pilots to easily track two time zones.
• 1956 - Rolex introduces first "anti-magnetic" watch in history [Reference 6543].
• 1956 - Rolex Oyster Perpetual Day-Date model introduced at Basel Fair first wristwatch with a day wheel complication...
The Rolex Reference 6510/6511 Oyster Perpetual Day-Date...
with Cal.1055 movement...
Note: Above are extract from Jake's Rolex World website...
a special publication in the honour of...
the Late Mr. Hans Wilsdorf's lifetime greatest achievements...
(emphasis in Italic is Orchi's)
http://www.google.com.my/url?sa=t&rc...K6mZ8g&cad=rja
Examples of Ref 651x...the 1st Generation of...
Oyster Perpetual Day-Date watches...
(Pic of Antiquorum)
(Pic excerpt from VRF)
By the following year in 1957...
n for very short few months...
Rolex launched the Rolex Oyster Perpetual...
Day-Date Reference 6611B...
n 6611/6612/6613 as the successors to the earliest Reference 6510/6511 Day-Date...at the time.
This picture would show...
this Ref 6611B Oyster Perpetual Day-Date watch...
in 18K Rose or Pink Gold case...
has the similar movement of its predecessor...
Cal. 1055...but it is instead marked as "1055B"...
with additional prefix alphabet "B"...
At this point...
Orchi is still unsure of any technical difference...
or what the prefix "B' would stand for...
by comparing with the previous Cal.1055...
with Cal.1055"B" movements...
which is found this Ref 6611B watch...
