Seiko Cal. 6638 - 230

Released in 1987, the Cal. 6638 with design code 230 was part of Seiko's domestic market collection. It features a White dial protected by a Mineral crystal and offers 150m of water resistance. [seikata-wm-6c1403e7ba91]

Also known as: Bullhead

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

36mm

Case Thickness

14.9mm

Lug Width

22mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

150m

Dial Color

White

Jewels

18j

Frequency

21,600 bph

Power Reserve

41 hours

Year

1987

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