Seiko Cal. 3821 - 712

This Automatic model from 1968 features a 39mm Stainless Steel case. Powered by the 3821 caliber with 36j jewels beating at 21,600 bph, it delivers a 38 hours power reserve. [seikata-wm-9c6b2c3b0359]

Also known as: Tuna, Baby Tuna

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

39mm

Case Thickness

13.1mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

140m

Dial Color

White

Jewels

36j

Frequency

21,600 bph

Power Reserve

38 hours

Year

1968

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