Seiko Cal. 6661 - 630

This Hand-Winding model from 1972 features a 39mm PVD Black case. It features a Silver dial protected by a Acrylic crystal and offers 30m of water resistance. [seikata-wm-383ec8da0ae7]

Also known as: Monster, Tuna

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

39mm

Case Thickness

13.5mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

Silver

Jewels

18j

Frequency

28,800 bph

Power Reserve

64 hours

Year

1972

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