Seiko Cal. 6656 - 491

The Seiko 6656-491 represents an important milestone in Seiko's 1976 lineup. It features a Green dial protected by a Sapphire crystal and offers 190m of water resistance. [seikata-wm-07fb0b8c8073]

Also known as: Bullhead, Bellmatic

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

37mm

Case Thickness

12.2mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

190m

Dial Color

Green

Jewels

30j

Frequency

28,800 bph

Power Reserve

56 hours

Year

1976

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