Seiko Cal. 6638 - 103

The 6638-103 is a sought-after Spring Drive piece from Seiko's golden era. With its 18mm lug width and 13.2mm profile, it sits comfortably on most wrists. [seikata-wm-2940fb6af3c1]

Also known as: Monster

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

44mm

Case Thickness

13.2mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

160m

Dial Color

Burgundy

Jewels

28j

Frequency

21,600 bph

Power Reserve

64 hours

Year

1969

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