Seiko Cal. 6178 - 881

Released in 1979, the Cal. 6178 with design code 881 was part of Seiko's domestic market collection. Powered by the 6178 caliber with 36j jewels beating at 36,000 bph, it delivers a 60 hours power reserve. [seikata-wm-9ec3ce2a30e2]

Also known as: Tuna, World Timer

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

44mm

Case Thickness

12.9mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

140m

Dial Color

Green

Jewels

36j

Frequency

36,000 bph

Power Reserve

60 hours

Year

1979

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