Seiko Cal. 3857 - 861

This Hand-Winding model from 1969 features a 45mm Stainless Steel case. It features a White dial protected by a Mineral crystal and offers 140m of water resistance. [seikata-wm-c783421c2280]

Also known as: Tuna, Helmet

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

45mm

Case Thickness

12.5mm

Lug Width

18mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

140m

Dial Color

White

Jewels

33j

Frequency

21,600 bph

Power Reserve

52 hours

Year

1969

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