Seiko Cal. 5618 - 312

The 5618-312 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 5618 caliber with 28j jewels beating at 28,800 bph, it delivers a 37 hours power reserve. [seikata-wm-8284c4251537]

Also known as: World Timer, Golden Tuna

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

37mm

Case Thickness

15.0mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

80m

Dial Color

Green

Jewels

28j

Frequency

28,800 bph

Power Reserve

37 hours

Year

1999

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