Seiko Cal. 5240 - 337

The 5240-337 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 5240 caliber with 21j jewels beating at 28,800 bph, it delivers a 57 hours power reserve. [seikata-wm-368fe75226ca]

Also known as: World Timer

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

35mm

Case Thickness

14.8mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

160m

Dial Color

Blue Sunburst

Jewels

21j

Frequency

28,800 bph

Power Reserve

57 hours

Year

1972

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