Seiko Cal. 3878 - 860

The Seiko 3878-860 represents an important milestone in Seiko's 1967 lineup. It features a Silver dial protected by a Mineral crystal and offers 30m of water resistance. [seikata-wm-10b1a4deaea0]

Also known as: Bullhead, Sportsmatic

Specifications

Movement

Kinetic

Case Material

Stainless Steel

Case Width

39mm

Case Thickness

14.6mm

Lug Width

18mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

30m

Dial Color

Silver

Jewels

23j

Frequency

36,000 bph

Power Reserve

59 hours

Year

1967

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