Seiko Cal. 6656 - 864

Released in 1977, the Cal. 6656 with design code 864 was part of Seiko's domestic market collection. It features a Green dial protected by a Acrylic crystal and offers 120m of water resistance. [seikata-wm-30faca3dc42b]

Also known as: Bullhead, Bellmatic

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

41mm

Case Thickness

10.6mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

120m

Dial Color

Green

Jewels

32j

Frequency

36,000 bph

Power Reserve

40 hours

Year

1977

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