Seiko Cal. 6638 - 766

Released in 1981, the Cal. 6638 with design code 766 was part of Seiko's domestic market collection. It features a Cream dial protected by a Mineral crystal and offers 70m of water resistance. [seikata-wm-3390aad50cf7]

Specifications

Movement

Kinetic

Case Material

Stainless Steel

Case Width

42mm

Case Thickness

11.1mm

Lug Width

20mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

70m

Dial Color

Cream

Jewels

24j

Frequency

36,000 bph

Power Reserve

62 hours

Year

1981

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