Seiko Cal. 4481 - 827

The Seiko 4481-827 represents an important milestone in Seiko's 1971 lineup. Powered by the 4481 caliber with 23j jewels beating at 21,600 bph, it delivers a 51 hours power reserve. [seikata-wm-8031b3f011f7]

Also known as: Tuna

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

8.1mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Black

Jewels

23j

Frequency

21,600 bph

Power Reserve

51 hours

Year

1971

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