Seiko Cal. 3811 - 387

The Seiko 3811-387 represents an important milestone in Seiko's 1991 lineup. It features a Black dial protected by a Sapphire crystal and offers 140m of water resistance. [seikata-wm-49e341956160]

Also known as: Sportsmatic, World Timer

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

45mm

Case Thickness

10.5mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

140m

Dial Color

Black

Jewels

33j

Frequency

21,600 bph

Power Reserve

53 hours

Year

1991

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