The beauty of the present rose gold reference 3131 "Bubbleback" can hardly be matched, not only by any other vintage Rolex, but quite likely also by any other wristwatch from the 1940s. Its pink gold case is in close to immaculate condition with a mirror polished wide bezel crowning the otherwise satin finished surface to the case. The subtle rose dial is surrounded by a outer matte ring, divided into 60 seconds and fifths of a second, and features very subtle and minimalistic Roman numerals for the quarters, and dark, drilled circular hour markers in between.

The serial number is no longer embossed on the caseback, but instead finely engraved in between the lugs. This technique had been introduced by Rolex in the mid 1940s, and shows that this most charismatic rose gold "Bubbleback" is one of the last examples of this landmark model's production.