Seiko Cal. 6631 - 354

The Seiko 6631-354 represents an important milestone in Seiko's 1967 lineup. It features a Burgundy dial protected by a Acrylic crystal and offers 160m of water resistance. [seikata-wm-c89df3491ba6]

Also known as: Monster, Crown

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

46mm

Case Thickness

8.4mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

160m

Dial Color

Burgundy

Jewels

22j

Frequency

36,000 bph

Power Reserve

38 hours

Year

1967

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