Seiko Cal. 6635 - 537

The Seiko 6635-537 represents an important milestone in Seiko's 1977 lineup. It features a Navy dial protected by a Acrylic crystal and offers 60m of water resistance. [seikata-wm-bffafce138bf]

Also known as: Monster, Helmet

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

39mm

Case Thickness

15.9mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

60m

Dial Color

Navy

Jewels

17j

Frequency

21,600 bph

Power Reserve

58 hours

Year

1977

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