Seiko Cal. 6638 - 150

Released in 1967, the Cal. 6638 with design code 150 was part of Seiko's domestic market collection. With its 19mm lug width and 12.7mm profile, it sits comfortably on most wrists. [seikata-wm-92e0dd0997df]

Also known as: Bellmatic

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

40mm

Case Thickness

12.7mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

150m

Dial Color

Green

Jewels

35j

Frequency

28,800 bph

Power Reserve

53 hours

Year

1967

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