Seiko Cal. 6638 - 201

The Seiko 6638-201 represents an important milestone in Seiko's 1998 lineup. It features a Navy dial protected by a Acrylic crystal and offers 170m of water resistance. [seikata-wm-8311f7759797]

Also known as: Helmet, Crown

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

41mm

Case Thickness

9.1mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

170m

Dial Color

Navy

Jewels

19j

Frequency

21,600 bph

Power Reserve

37 hours

Year

1998

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