Seiko Cal. 4556 - 638

The Seiko 4556-638 represents an important milestone in Seiko's 1999 lineup. It features a Silver dial protected by a Sapphire crystal and offers 80m of water resistance. [seikata-wm-8c4f89ef9a81]

Also known as: Tuna

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

42mm

Case Thickness

15.7mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

80m

Dial Color

Silver

Jewels

32j

Frequency

28,800 bph

Power Reserve

39 hours

Year

1999

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