Seiko Cal. 3878 - 156

The Seiko 3878-156 represents an important milestone in Seiko's 1975 lineup. It features a Navy dial protected by a Hardlex crystal and offers 50m of water resistance. [seikata-wm-bc61eac95896]

Also known as: Baby Tuna

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

35mm

Case Thickness

10.0mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

50m

Dial Color

Navy

Jewels

18j

Frequency

36,000 bph

Power Reserve

60 hours

Year

1975

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