Seiko Cal. 6635 - 607

The Seiko 6635-607 represents an important milestone in Seiko's 1978 lineup. It features a Cream dial protected by a Mineral crystal and offers 130m of water resistance. [seikata-wm-a8173fb93302]

Also known as: Tuna, Golden Tuna

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

10.0mm

Lug Width

18mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

130m

Dial Color

Cream

Jewels

23j

Frequency

28,800 bph

Power Reserve

68 hours

Year

1978

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