Seiko Cal. 3851 - 374

This Hand-Winding model from 1970 features a 37mm Hardlex-Coated Steel case. Powered by the 3851 caliber with 26j jewels beating at 28,800 bph, it delivers a 38 hours power reserve. [seikata-wm-49ad7fb583f7]

Also known as: Helmet, Golden Tuna

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

13.2mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

90m

Dial Color

Blue Sunburst

Jewels

26j

Frequency

28,800 bph

Power Reserve

38 hours

Year

1970

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