Seiko Cal. 4556 - 639

The Seiko 4556-639 represents an important milestone in Seiko's 1966 lineup. It features a Champagne dial protected by a Mineral crystal and offers 140m of water resistance. [seikata-wm-ba4aaf83e822]

Also known as: UFO, Navigator

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

37mm

Case Thickness

9.5mm

Lug Width

19mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

140m

Dial Color

Champagne

Jewels

21j

Frequency

36,000 bph

Power Reserve

66 hours

Year

1966

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