Seiko Cal. 6678 - 692

This Spring Drive model from 1970 features a 37mm PVD Black case. Powered by the 6678 caliber with 25j jewels beating at 21,600 bph, it delivers a 42 hours power reserve. [seikata-wm-525c4e1bfa8b]

Also known as: Monster

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

37mm

Case Thickness

13.4mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

150m

Dial Color

Cream

Jewels

25j

Frequency

21,600 bph

Power Reserve

42 hours

Year

1970

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