Seiko Cal. 5618 - 556

The 5618-556 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 5618 caliber with 29j jewels beating at 36,000 bph, it delivers a 44 hours power reserve. [seikata-wm-e437263ef805]

Also known as: Golden Tuna, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

38mm

Case Thickness

13.2mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

140m

Dial Color

White

Jewels

29j

Frequency

36,000 bph

Power Reserve

44 hours

Year

1984

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