Seiko Cal. 3828 - 873

The 3828-873 is a sought-after Solar piece from Seiko's golden era. Powered by the 3828 caliber with 28j jewels beating at 28,800 bph, it delivers a 50 hours power reserve. [seikata-wm-59fab2a40dc7]

Also known as: Helmet, Sportsmatic

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

9.9mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

180m

Dial Color

White

Jewels

28j

Frequency

28,800 bph

Power Reserve

50 hours

Year

1975

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