Seiko Cal. 3828 - 907

This Solar model from 1975 features a 39mm Two-Tone case. Powered by the 3828 caliber with 23j jewels beating at 28,800 bph, it delivers a 69 hours power reserve. [seikata-wm-4d3a43559f5d]

Also known as: Helmet, Sportsmatic

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

39mm

Case Thickness

14.8mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

70m

Dial Color

Navy

Jewels

23j

Frequency

28,800 bph

Power Reserve

69 hours

Year

1975

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