Seiko Cal. 6639 - 441

The Seiko 6639-441 represents an important milestone in Seiko's 1991 lineup. It features a Navy dial protected by a Mineral crystal and offers 150m of water resistance. [seikata-wm-6895131736c7]

Also known as: Sportsmatic, Golden Tuna

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

36mm

Case Thickness

8.6mm

Lug Width

20mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

150m

Dial Color

Navy

Jewels

30j

Frequency

36,000 bph

Power Reserve

42 hours

Year

1991

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