Seiko Cal. 6638 - 185

This Hand-Winding model from 1988 features a 46mm PVD Black case. With its 22mm lug width and 12.8mm profile, it sits comfortably on most wrists. [seikata-wm-7ec38e019df8]

Also known as: Helmet, Navigator

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

46mm

Case Thickness

12.8mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

190m

Dial Color

Silver

Jewels

29j

Frequency

28,800 bph

Power Reserve

45 hours

Year

1988

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