Seiko Cal. 6631 - 435

Released in 1977, the Cal. 6631 with design code 435 was part of Seiko's domestic market collection. It features a Green dial protected by a Sapphire crystal and offers 190m of water resistance. [seikata-wm-233ca3eff1db]

Also known as: Rally, Emperor

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

40mm

Case Thickness

9.9mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

190m

Dial Color

Green

Jewels

29j

Frequency

36,000 bph

Power Reserve

59 hours

Year

1977

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