Seiko Cal. 3813 - 677

Released in 1968, the Cal. 3813 with design code 677 was part of Seiko's domestic market collection. It features a Black dial protected by a Sapphire crystal and offers 40m of water resistance. [seikata-wm-6da803db776f]

Also known as: Shogun

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

45mm

Case Thickness

11.8mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

40m

Dial Color

Black

Jewels

25j

Frequency

36,000 bph

Power Reserve

47 hours

Year

1968

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