Seiko Cal. 6181 - 640

Seiko 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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