Seiko Cal. 6644 - 268

Released in 1977, the Cal. 6644 with design code 268 was part of Seiko's domestic market collection. It features a Green dial protected by a Sapphire crystal and offers 140m of water resistance. [seikata-wm-15776883f590]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

36mm

Case Thickness

11.0mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

140m

Dial Color

Green

Jewels

36j

Frequency

21,600 bph

Power Reserve

45 hours

Year

1977

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