Seiko Cal. 3815 - 428

This Hand-Winding model from 1984 features a 44mm Two-Tone case. Powered by the 3815 caliber with 23j jewels beating at 21,600 bph, it delivers a 56 hours power reserve. [seikata-wm-cd24c5e375f9]

Also known as: World Timer

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

44mm

Case Thickness

15.5mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

130m

Dial Color

Cream

Jewels

23j

Frequency

21,600 bph

Power Reserve

56 hours

Year

1984

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