Seiko Cal. 4577 - 550

The Seiko 4577-550 represents an important milestone in Seiko's 1981 lineup. It features a Green dial protected by a Mineral crystal and offers 100m of water resistance. [seikata-wm-2faf892436fd]

Also known as: UFO

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

37mm

Case Thickness

15.0mm

Lug Width

21mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

Green

Jewels

24j

Frequency

28,800 bph

Power Reserve

45 hours

Year

1981

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