Seiko Cal. 6661 - 680

The 6661-680 is a sought-after Hand-Winding piece from Seiko's golden era. It features a Green dial protected by a Hardlex crystal and offers 40m of water resistance. [seikata-wm-52d2b89f253e]

Also known as: Monster, Sea Horse

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

34mm

Case Thickness

10.3mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

40m

Dial Color

Green

Jewels

34j

Frequency

21,600 bph

Power Reserve

64 hours

Year

1971

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