Seiko Cal. 6635 - 156

The Seiko 6635-156 represents an important milestone in Seiko's 1971 lineup. It features a Navy dial protected by a Mineral crystal and offers 160m of water resistance. [seikata-wm-4b7be73b3ca9]

Also known as: Tuna

Specifications

Movement

Quartz

Case Material

Stainless Steel

Case Width

34mm

Case Thickness

9.0mm

Lug Width

20mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

160m

Dial Color

Navy

Jewels

27j

Frequency

28,800 bph

Power Reserve

56 hours

Year

1971

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