1950s OMEGA Cal.320 Rare 37mm Oversize Chronograph with Pulsation Dial (Unpolished Case)

Manufacturer OMEGA
Model Chronograph
Year of Manufacture 1950s
Reference no. 2475
Product no. B-10577
This is a very rare 37mm oversized chronograph with a silver two-tone dial, manufactured in 1959-60 and equipped with the famous Omega Cal.320.

It is equipped with Cal.320, a two-resistor version of Cal.321, which is also used in Speedmaster. This watch is equipped with the two-resistor version of Cal.321 Cal.320, which is also equipped on the Speedmaster. In this era, the screw back version is also available in 34mm size, and the 37mm size is very rare except for sports models, whether water resistant or not. The dial is a three-dimensional two-tone specification, and the wedge indexes and the alpha hand common to Speedmasters of the same age are a precious gem that fascinates the aspect of the age and the taste with the texture by aging.
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Item details

Serial no. ---
Caliber 320
Movement no. 15,146,***
Movement type Manual winding
Material Stainless Steel
Case size 37mm
Case type Snap back Non-Water-resistant
Dial Original
Type of Indices Applied
Belt non Original (20mm, between lugs)
Evaluation case 94%
Evaluation dial 93%
Evaluation mov 95%
Condition 4.5
Rarity 4.5

Other details

Case: There are some minor scratches and ageing, but the case is in good condition, retaining its original shape, volume, and sharp edges.

Dial: The dial is in good condition with slight ageing, but still retains its original print.

Movement: The winding and chrono functions are good, and the accuracy is around 50 seconds per day.