Seiko Cal. 6639 - 502

The Seiko 6639-502 represents an important milestone in Seiko's 1987 lineup. It features a Cream dial protected by a Sapphire crystal and offers 160m of water resistance. [seikata-wm-1d30e30e9b34]

Also known as: Tuna

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

37mm

Case Thickness

12.7mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

160m

Dial Color

Cream

Jewels

34j

Frequency

36,000 bph

Power Reserve

47 hours

Year

1987

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