Seiko Cal. 6181 - 413

The Seiko 6181-413 represents an important milestone in Seiko's 1972 lineup. Powered by the 6181 caliber with 31j jewels beating at 28,800 bph, it delivers a 72 hours power reserve. [seikata-wm-c4b055d65e44]

Also known as: Samurai, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

39mm

Case Thickness

13.3mm

Lug Width

21mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

110m

Dial Color

Blue Sunburst

Jewels

31j

Frequency

28,800 bph

Power Reserve

72 hours

Year

1972

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