Seiko Cal. 3827 - 941

This Spring Drive model from 1978 features a 42mm PVD Black case. Powered by the 3827 caliber with 31j jewels beating at 21,600 bph, it delivers a 71 hours power reserve. [seikata-wm-818ac9c05130]

Also known as: Tuna

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

42mm

Case Thickness

12.8mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

170m

Dial Color

Black

Jewels

31j

Frequency

21,600 bph

Power Reserve

71 hours

Year

1978

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