Seiko Cal. 6637 - 321

The Seiko 6637-321 represents an important milestone in Seiko's 1983 lineup. It features a Silver dial protected by a Mineral crystal and offers 100m of water resistance. [seikata-wm-cf923ce298a1]

Also known as: Silverwave, Baby Tuna

Specifications

Movement

Kinetic

Case Material

Titanium

Case Width

44mm

Case Thickness

15.9mm

Lug Width

22mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

100m

Dial Color

Silver

Jewels

24j

Frequency

21,600 bph

Power Reserve

69 hours

Year

1983

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