Seiko Cal. 6638 - 721

The Seiko 6638-721 represents an important milestone in Seiko's 1983 lineup. With its 18mm lug width and 10.6mm profile, it sits comfortably on most wrists. [seikata-wm-3a2db3324105]

Also known as: Panda

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

37mm

Case Thickness

10.6mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

170m

Dial Color

Champagne

Jewels

35j

Frequency

21,600 bph

Power Reserve

37 hours

Year

1983

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