Seiko Cal. 6638 - 157

The 6638-157 is a sought-after Hand-Winding piece from Seiko's golden era. The Inner Rotating bezel and 39mm case give it a distinctive presence on the wrist. [seikata-wm-9fea7bf95f22]

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

39mm

Case Thickness

8.2mm

Lug Width

20mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

130m

Dial Color

Silver

Jewels

18j

Frequency

28,800 bph

Power Reserve

43 hours

Year

1989

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