Seiko Cal. 6635 - 780

The Seiko 6635-780 represents an important milestone in Seiko's 1992 lineup. It features a Silver dial protected by a Mineral crystal and offers 50m of water resistance. [seikata-wm-756e0a1886fa]

Also known as: Helmet, Bellmatic

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

34mm

Case Thickness

12.1mm

Lug Width

21mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Silver

Jewels

36j

Frequency

21,600 bph

Power Reserve

61 hours

Year

1992

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