Seiko Cal. 6670 - 542

The Seiko 6670-542 represents an important milestone in Seiko's 1988 lineup. Powered by the 6670 caliber with 25j jewels beating at 21,600 bph, it delivers a 55 hours power reserve. [seikata-wm-fcec92890fa8]

Also known as: Helmet, Bellmatic

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

44mm

Case Thickness

15.7mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

110m

Dial Color

Silver

Jewels

25j

Frequency

21,600 bph

Power Reserve

55 hours

Year

1988

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