Seiko Cal. 5680 - 637

The Seiko 5680-637 represents an important milestone in Seiko's 1996 lineup. It features a Silver dial protected by a Sapphire crystal and offers 30m of water resistance. [seikata-wm-791ec723752b]

Also known as: Tuna

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

11.5mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

30m

Dial Color

Silver

Jewels

27j

Frequency

36,000 bph

Power Reserve

38 hours

Year

1996

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