Seiko Cal. 6241 - 787

This Spring Drive model from 1977 features a 39mm Hardlex-Coated Steel case. The Bidirectional bezel and 39mm case give it a distinctive presence on the wrist. [seikata-wm-f9fdb6d1f537]

Also known as: Helmet, Bellmatic

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

13.6mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

190m

Dial Color

Burgundy

Jewels

21j

Frequency

36,000 bph

Power Reserve

37 hours

Year

1977

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