Seiko Cal. 4557 - 634

The Seiko 4557-634 represents an important milestone in Seiko's 1975 lineup. It features a Green dial protected by a Sapphire crystal and offers 110m of water resistance. [seikata-wm-2c869cf5a42b]

Also known as: Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

40mm

Case Thickness

15.5mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

Green

Jewels

20j

Frequency

36,000 bph

Power Reserve

53 hours

Year

1975

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