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Rolex Big Bubbleback ref 6105 from 1953

 

The Rolex 6105 is often referred to as the “Big Bubble Back” or “Ovettone” or 大倌財 by collectors, due to the generous volume of its case. 


The Big Bubbleback is considered as one the PrevDatejust model. Found within the aperture at 3 o’clock is the date indicator printed with red numerals. Instead of the screw down crown, the watch is fitted with the Super Oyster Crown – a convenient design that provided water resistance without needing to be screwed down. This particular crown was introduced by Rolex in 1950 and discontinued only 2-3 years later due to Rolex’s strict requirement for greater water resistance. It is using the A296 semi bubbleback movement. 








Comparison between the Normal Rolex Bubbleback ref 3372 with the Big Bubbleback 

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