Seiko Cal. 6638 - 140

Released in 1976, the Cal. 6638 with design code 140 was part of Seiko's domestic market collection. It features a Green dial protected by a Acrylic crystal and offers 120m of water resistance. [seikata-wm-88c18e85d4b4]

Also known as: Goldfeather

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

44mm

Case Thickness

15.7mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

120m

Dial Color

Green

Jewels

23j

Frequency

36,000 bph

Power Reserve

54 hours

Year

1976

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