Seiko Cal. 6618 - 685

This Spring Drive model from 1974 features a 41mm Hardlex-Coated Steel case. Powered by the 6618 caliber with 30j jewels beating at 21,600 bph, it delivers a 52 hours power reserve. [seikata-wm-4f9521dcce80]

Also known as: Bullhead, Flighty

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

13.5mm

Lug Width

19mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

90m

Dial Color

Burgundy

Jewels

30j

Frequency

21,600 bph

Power Reserve

52 hours

Year

1974

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