Seiko Cal. 6318 - 420

The Seiko 6318-420 represents an important milestone in Seiko's 1974 lineup. Powered by the 6318 caliber with 32j jewels beating at 21,600 bph, it delivers a 59 hours power reserve. [seikata-wm-0f065b037e4d]

Also known as: Baby Tuna

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

41mm

Case Thickness

11.3mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

90m

Dial Color

Black

Jewels

32j

Frequency

21,600 bph

Power Reserve

59 hours

Year

1974

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