Seiko Cal. 3817 - 552

The Seiko 3817-552 represents an important milestone in Seiko's 1973 lineup. Powered by the 3817 caliber with 22j jewels beating at 21,600 bph, it delivers a 71 hours power reserve. [seikata-wm-4375eae28840]

Also known as: Sumo

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

36mm

Case Thickness

15.2mm

Lug Width

20mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

40m

Dial Color

Blue Sunburst

Jewels

22j

Frequency

21,600 bph

Power Reserve

71 hours

Year

1973

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