Seiko Cal. 3818 - 178

The Seiko 3818-178 represents an important milestone in Seiko's 1977 lineup. Powered by the 3818 caliber with 18j jewels beating at 21,600 bph, it delivers a 36 hours power reserve. [seikata-wm-cbf88d55f75c]

Also known as: World Timer, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

45mm

Case Thickness

10.4mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Champagne

Jewels

18j

Frequency

21,600 bph

Power Reserve

36 hours

Year

1977

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