Seiko Cal. 5240 - 781

Seiko 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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