Seiko Cal. 4557 - 639

The Seiko 4557-639 represents an important milestone in Seiko's 1969 lineup. It features a Green dial protected by a Acrylic crystal and offers 100m of water resistance. [seikata-wm-0f03ac1337b3]

Also known as: Turtle, Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

46mm

Case Thickness

12.7mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

100m

Dial Color

Green

Jewels

31j

Frequency

21,600 bph

Power Reserve

57 hours

Year

1969

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