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1930s Longines Cal.25.17 rare Asymmetric Rectangular with Black gilt dial in Staybrite

Manufacturer Longines
Model Rectangular
Year of Manufacture 1930s
Reference no. 2310
Product no. B-11107
Price

Manufactured in the late 1930s, this is a rare asymmetrical rectangular Longines model featuring the Cal. 25.17 and a black gilt dial.
The asymmetrical rectangular case—thicker on the 12 o’clock side than the 6 o’clock side—evokes the design of a driver’s watch. It houses Longines’ in-house rectangular movement, Cal. 25.17.

A hallmark of vintage Longines craftsmanship, the case and movement share matching serial numbers. Even the dust cover, characteristic of Cal. 25.17-equipped models, features an engraved serial number—a detail not typically seen on standard Cal. 25.17 pieces. These finely executed details highlight the exceptional rarity of this timepiece.

Furthermore, the black gilt dial—uncommon for this era—adds to the overall uniqueness and collectability of the watch.

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Item details

Serial no. 5,556,***
Caliber 25.17
Movement no. 5,556,***
Movement type Manual winding
Material Staybrite
Case size 20×38mm
Case type Snap back Non-Water-resistant
Dial Original
Type of Indices Print
Belt Non-original (fix,17mm, between lugs)
Evaluation case 93%
Evaluation dial 92%
Evaluation mov 93%
Condition 4.5
Rarity 4.5

Other details

Case: Good condition with minor scratches and age, but well preserved with original shaping and volume and engraving on the back.

Dial: some ageing and minor scratches, but still retains sufficient luster and print on the black mirror.

Movement: winding, etc. is good, and the accuracy is around 60 seconds per day.