Seiko Cal. 4557 - 639

Seiko 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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