Seiko Cal. 3870 - 401

The 3870-401 is a sought-after Spring Drive piece from Seiko's golden era. It features a Green dial protected by a Mineral crystal and offers 30m of water resistance. [seikata-wm-48c3e968e5f5]

Also known as: UFO, Arnie

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

41mm

Case Thickness

11.6mm

Lug Width

18mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

30m

Dial Color

Green

Jewels

17j

Frequency

28,800 bph

Power Reserve

43 hours

Year

1974

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