Seiko Cal. 3878 - 578

This Spring Drive model from 1978 features a 42mm Hardlex-Coated Steel case. With its 20mm lug width and 9.7mm profile, it sits comfortably on most wrists. [seikata-wm-e742e0fa058c]

Also known as: Arnie

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

9.7mm

Lug Width

20mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

170m

Dial Color

Champagne

Jewels

25j

Frequency

36,000 bph

Power Reserve

56 hours

Year

1978

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