Seiko Cal. 7171 - 728

This Hand-Winding model from 1971 features a 42mm Hardlex-Coated Steel case. Powered by the 7171 caliber with 18j jewels beating at 28,800 bph, it delivers a 54 hours power reserve. [seikata-wm-4971339a9d74]

Also known as: Sumo, Goldfeather

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

12.7mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

200m

Dial Color

Burgundy

Jewels

18j

Frequency

28,800 bph

Power Reserve

54 hours

Year

1971

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