1940s Rolex Bubble Back "Semi Unique" 31mm Stainless Steel

Manufacturer ROLEX OYSTER
Model Bubble Back
Year of Manufacture 1940's
Reference no. 2764
Product no. A-5955
Early 1940s Rolex Bubbleback ss popular semi-unique dial with a very rare sub-second. This model is equipped with a sub-second movement, Cal. 620, which is very rare in the semi-unique dials where center-second models are predominantly used. The unique design of the sub-second model and the ageing of the texture are wonderfully appealing, and the old two-piece case with a precious mid-crown is a product with a period look.
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Item details

Serial no. 107,***
Caliber 620
Movement no. N5,***
Movement type Automatic
Material Stainless steel
Case size 31mm
Case type Screw back water proof
Dial Original
Type of Indices Luminous
Belt Non-original, 17mm lug width
Evaluation case 92%
Evaluation dial 93%
Evaluation mov 93%
Condition 4.5
Rarity 5

Other details

Case: minor scratches and ageing, but retains enough of the original shape and volume. Dial: slight ageing, but retains the black mirror shine and original luminescent paint. Movement: no winding or screwing problems. Accuracy is about 40 seconds per day.