Seiko Cal. 5271 - 237

The Seiko 5271-237 represents an important milestone in Seiko's 1981 lineup. Powered by the 5271 caliber with 18j jewels beating at 21,600 bph, it delivers a 48 hours power reserve. [seikata-wm-cf99ed03b48c]

Also known as: Tuna, Navigator

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

45mm

Case Thickness

9.1mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

130m

Dial Color

Blue Sunburst

Jewels

18j

Frequency

21,600 bph

Power Reserve

48 hours

Year

1981

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