Seiko Cal. 6638 - 350

The Seiko 6638-350 represents an important milestone in Seiko's 1970 lineup. It features a Cream dial protected by a Sapphire crystal and offers 170m of water resistance. [seikata-wm-1198dc9a30a1]

Also known as: Goldfeather, Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

36mm

Case Thickness

14.1mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

170m

Dial Color

Cream

Jewels

29j

Frequency

21,600 bph

Power Reserve

36 hours

Year

1970

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