Seiko Cal. 6631 - 407

The Seiko 6631-407 represents an important milestone in Seiko's 1985 lineup. It features a Silver dial protected by a Acrylic crystal and offers 110m of water resistance. [seikata-wm-198ca81f228a]

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

38mm

Case Thickness

13.7mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

110m

Dial Color

Silver

Jewels

19j

Frequency

28,800 bph

Power Reserve

41 hours

Year

1985

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