Seiko Cal. 5663 - 385

The Seiko 5663-385 represents an important milestone in Seiko's 1968 lineup. It features a Green dial protected by a Mineral crystal and offers 140m of water resistance. [seikata-wm-0b47ee9ae126]

Also known as: Sea Horse, Arnie

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

11.7mm

Lug Width

20mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

140m

Dial Color

Green

Jewels

21j

Frequency

21,600 bph

Power Reserve

66 hours

Year

1968

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