Seiko Cal. 6639 - 477

The Seiko 6639-477 represents an important milestone in Seiko's 1990 lineup. It features a Green dial protected by a Sapphire crystal and offers 150m of water resistance. [seikata-wm-df031e2e32ae]

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

46mm

Case Thickness

14.2mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

150m

Dial Color

Green

Jewels

25j

Frequency

28,800 bph

Power Reserve

48 hours

Year

1990

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