Seiko Cal. 6638 - 509

The Seiko 6638-509 represents an important milestone in Seiko's 1974 lineup. With its 22mm lug width and 8.2mm profile, it sits comfortably on most wrists. [seikata-wm-a7dc1ddea513]

Also known as: Samurai, Bellmatic

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

46mm

Case Thickness

8.2mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Green

Jewels

28j

Frequency

21,600 bph

Power Reserve

44 hours

Year

1974

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