Seiko Cal. 3878 - 438

This Solar model from 1966 features a 42mm PVD Black case. Powered by the 3878 caliber with 21j jewels beating at 21,600 bph, it delivers a 69 hours power reserve. [seikata-wm-5a0cba8374b0]

Also known as: Helmet

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

42mm

Case Thickness

12.4mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

160m

Dial Color

Champagne

Jewels

21j

Frequency

21,600 bph

Power Reserve

69 hours

Year

1966

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