Seiko Cal. 6634 - 561

The Seiko 6634-561 represents an important milestone in Seiko's 1996 lineup. The Bidirectional bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-c88fc4f70226]

Also known as: Helmet, Rally

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

40mm

Case Thickness

12.7mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

110m

Dial Color

White

Jewels

23j

Frequency

28,800 bph

Power Reserve

40 hours

Year

1996

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