Seiko Cal. 3855 - 729

The Seiko 3855-729 represents an important milestone in Seiko's 1981 lineup. Powered by the 3855 caliber with 31j jewels beating at 28,800 bph, it delivers a 37 hours power reserve. [seikata-wm-b4593b9b5372]

Also known as: Sumo, Golden Tuna

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

36mm

Case Thickness

12.2mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

170m

Dial Color

Green

Jewels

31j

Frequency

28,800 bph

Power Reserve

37 hours

Year

1981

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