Seiko Cal. 3813 - 257

The Seiko 3813-257 represents an important milestone in Seiko's 1971 lineup. It features a Navy dial protected by a Mineral crystal and offers 40m of water resistance. [seikata-wm-ec2c6ad2ae12]

Also known as: World Timer, Sea Horse

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

40mm

Case Thickness

8.0mm

Lug Width

21mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

40m

Dial Color

Navy

Jewels

23j

Frequency

28,800 bph

Power Reserve

36 hours

Year

1971

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