Seiko Cal. 3813 - 678

This Spring Drive model from 1967 features a 45mm Two-Tone case. Powered by the 3813 caliber with 33j jewels beating at 36,000 bph, it delivers a 57 hours power reserve. [seikata-wm-2811650cf21b]

Also known as: World Timer, Navigator

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

45mm

Case Thickness

9.7mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

140m

Dial Color

Cream

Jewels

33j

Frequency

36,000 bph

Power Reserve

57 hours

Year

1967

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