Seiko Cal. 5240 - 781

The 5240-781 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 5240 caliber with 34j jewels beating at 21,600 bph, it delivers a 46 hours power reserve. [seikata-wm-4d3c9fc1cddd]

Also known as: Monster

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

37mm

Case Thickness

9.8mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

140m

Dial Color

Blue Sunburst

Jewels

34j

Frequency

21,600 bph

Power Reserve

46 hours

Year

1980

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