Seiko Cal. 3815 - 320

This Spring Drive model from 1975 features a 39mm Hardlex-Coated Steel case. Powered by the 3815 caliber with 28j jewels beating at 36,000 bph, it delivers a 45 hours power reserve. [seikata-wm-51a9e1d423d8]

Also known as: Silverwave, World Timer

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

10.4mm

Lug Width

21mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

190m

Dial Color

Champagne

Jewels

28j

Frequency

36,000 bph

Power Reserve

45 hours

Year

1975

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