Seiko Cal. 3815 - 140

The Seiko 3815-140 represents an important milestone in Seiko's 1978 lineup. It features a Silver dial protected by a Mineral crystal and offers 110m of water resistance. [seikata-wm-27efd50e8d10]

Also known as: Sumo, World Timer

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

34mm

Case Thickness

13.4mm

Lug Width

18mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

110m

Dial Color

Silver

Jewels

30j

Frequency

28,800 bph

Power Reserve

51 hours

Year

1978

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