Seiko Cal. 6665 - 155

This Spring Drive model from 1977 features a 36mm Stainless Steel case. It features a Green dial protected by a Sapphire crystal and offers 40m of water resistance. [seikata-wm-e7cd7c4b50a1]

Also known as: Bullhead, Sea Horse

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

36mm

Case Thickness

15.4mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Green

Jewels

31j

Frequency

28,800 bph

Power Reserve

39 hours

Year

1977

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