Seiko Cal. 6278 - 639

The Seiko 6278-639 represents an important milestone in Seiko's 1975 lineup. It features a Black dial protected by a Mineral crystal and offers 60m of water resistance. [seikata-wm-6ce1c9132b3b]

Also known as: Sportsmatic, Bellmatic

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

37mm

Case Thickness

12.9mm

Lug Width

22mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

60m

Dial Color

Black

Jewels

35j

Frequency

21,600 bph

Power Reserve

72 hours

Year

1975

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