Seiko Cal. 6178 - 643

The Seiko 6178-643 represents an important milestone in Seiko's 1969 lineup. The Coin-Edge bezel and 36mm case give it a distinctive presence on the wrist. [seikata-wm-824faac1c434]

Also known as: Helmet, Baby Tuna

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

36mm

Case Thickness

8.7mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

70m

Dial Color

Blue Sunburst

Jewels

31j

Frequency

28,800 bph

Power Reserve

45 hours

Year

1969

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