Seiko Cal. 3840 - 673

This Spring Drive model from 1987 features a 44mm Stainless Steel case. It features a Green dial protected by a Acrylic crystal and offers 140m of water resistance. [seikata-wm-26a1c6c1ac10]

Also known as: Monster

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

44mm

Case Thickness

8.7mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

140m

Dial Color

Green

Jewels

22j

Frequency

28,800 bph

Power Reserve

66 hours

Year

1987

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