Seiko Cal. 6631 - 361

The Seiko 6631-361 represents an important milestone in Seiko's 1979 lineup. It features a Green dial protected by a Sapphire crystal and offers 130m of water resistance. [seikata-wm-933f73dc9db2]

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

45mm

Case Thickness

8.1mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

130m

Dial Color

Green

Jewels

22j

Frequency

28,800 bph

Power Reserve

46 hours

Year

1979

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