Seiko Cal. 6634 - 879

The Seiko 6634-879 represents an important milestone in Seiko's 1978 lineup. It features a Green dial protected by a Mineral crystal and offers 120m of water resistance. [seikata-wm-d5f4006c60b8]

Also known as: Sportsmatic

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

36mm

Case Thickness

15.5mm

Lug Width

19mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

120m

Dial Color

Green

Jewels

25j

Frequency

21,600 bph

Power Reserve

40 hours

Year

1978

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