Seiko Cal. 5642 - 178

The Seiko 5642-178 represents an important milestone in Seiko's 1995 lineup. Powered by the 5642 caliber with 21j jewels beating at 28,800 bph, it delivers a 40 hours power reserve. [seikata-wm-7da87a24661f]

Also known as: Tuna, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

36mm

Case Thickness

9.3mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Green

Jewels

21j

Frequency

28,800 bph

Power Reserve

40 hours

Year

1995

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