Seiko Cal. 6647 - 431

Released in 1969, the Cal. 6647 with design code 431 was part of Seiko's domestic market collection. It features a Green dial protected by a Sapphire crystal and offers 110m of water resistance. [seikata-wm-e71a244af6de]

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

12.9mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

110m

Dial Color

Green

Jewels

30j

Frequency

36,000 bph

Power Reserve

49 hours

Year

1969

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