Seiko Cal. 6181 - 640

The Seiko 6181-640 represents an important milestone in Seiko's 1990 lineup. Powered by the 6181 caliber with 18j jewels beating at 21,600 bph, it delivers a 45 hours power reserve. [seikata-wm-f8dc30ee7b84]

Also known as: Samurai, Golden Tuna

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

36mm

Case Thickness

9.0mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

130m

Dial Color

Black

Jewels

18j

Frequency

21,600 bph

Power Reserve

45 hours

Year

1990

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