Seiko Cal. 6181 - 557

Released in 1972, the Cal. 6181 with design code 557 was part of Seiko's domestic market collection. Powered by the 6181 caliber with 19j jewels beating at 36,000 bph, it delivers a 72 hours power reserve. [seikata-wm-7dd6cbfcd5ef]

Also known as: Bullhead, Golden Tuna

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

13.0mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

60m

Dial Color

White

Jewels

19j

Frequency

36,000 bph

Power Reserve

72 hours

Year

1972

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