Seiko Cal. 3812 - 687

The Seiko 3812-687 represents an important milestone in Seiko's 1965 lineup. The Bidirectional bezel and 39mm case give it a distinctive presence on the wrist. [seikata-wm-bacc77ee1417]

Also known as: Sumo, Emperor

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

39mm

Case Thickness

14.5mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

80m

Dial Color

Navy

Jewels

34j

Frequency

36,000 bph

Power Reserve

69 hours

Year

1965

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