Sunday, October 19, 2014

Rolex Bubbleback 5050

One of the more unique and historical significance Rolex watches is the Rolex Bubbleback, whose name comes from its protruding rounded case back, which bulges in order to accommodate the thick movement and rotor that turns on a pivot, powering the winding of the mainspring. 

The first Bubbleback, in automatic, made its appearance in 1933, and the watches were produced for only about twenty years. The Bubbleback helped establish Rolex as a brand known for its reliability, and these watches certainly are reliable—as evidenced by the relatively high number still functioning today.

Most of the early Bubblebacks displayed time only. The original model featured subsidiary seconds, which later changed to sweeping seconds. Later models also in the 50-60s also included the date, becoming the first DateJust models produced by Rolex. In 1935, Rolex developed the “Super Balance,” a streamlined balance wheel that improved the functioning of the Auto-Rotor. Rolex then began producing the watch in three different sizes to make it more appealing to individuals of both genders. In 1941, Rolex launched a Bubbleback model intended specifically for ladies.

Most popular versions of the Bubbleback are steelium stainless steel,  Rolesor (half gold, half steel) and gold (9k, 14k, 18k pink or yellow gold). The terms Steelium and Rolesor are unique creations of Rolex, who patented them in 1931 and 1933 respectively. 

Case style variations include engine-turned and smooth bezels as well as some with hooded lugs made for the U.S. Markets. More variation can be seen in the dial designs, which differ between black, pink or white dials, two-tone dials, 24-hour military-style dials and an atypical California dial with mixed Roman & Arabic numerals.

The Rolex Bubbleback is a very iconic watch and a coveted collector’s piece. This is a simple stainless steel bubbleback ref 5050 in very good condition from 1949. The 5050 is the larger version of the bubbleback with a diameter of 34mm versus the standard 32mm. 

When playing with this bubbleback, one needs to be careful with the condition of the movements as there is no more spare parts available and the only way to fix a non working one is to salvage parts from other working Bubblebacks.


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