Seiko Cal. 6634 - 521

The Seiko 6634-521 represents an important milestone in Seiko's 1995 lineup. It features a Green dial protected by a Acrylic crystal and offers 170m of water resistance. [seikata-wm-d4317264d6ed]

Also known as: Tuna, World Timer

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

14.5mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

170m

Dial Color

Green

Jewels

22j

Frequency

21,600 bph

Power Reserve

37 hours

Year

1995

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