Seiko Cal. 6636 - 643

Released in 1965, the Cal. 6636 with design code 643 was part of Seiko's domestic market collection. It features a Navy dial protected by a Sapphire crystal and offers 180m of water resistance. [seikata-wm-bc46cf20234e]

Also known as: Monster, Golden Tuna

Specifications

Movement

Kinetic

Case Material

Stainless Steel

Case Width

35mm

Case Thickness

11.1mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

Navy

Jewels

27j

Frequency

36,000 bph

Power Reserve

47 hours

Year

1965

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