Seiko Cal. 6640 - 903

The Seiko 6640-903 represents an important milestone in Seiko's 1972 lineup. It features a Burgundy dial protected by a Mineral crystal and offers 190m of water resistance. [seikata-wm-aa2ad8a6ff37]

Also known as: Samurai, Navigator

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

34mm

Case Thickness

14.3mm

Lug Width

19mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

190m

Dial Color

Burgundy

Jewels

24j

Frequency

21,600 bph

Power Reserve

50 hours

Year

1972

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