Seiko Cal. 6617 - 664

This Spring Drive model from 1968 features a 37mm PVD Black case. It features a Silver dial protected by a Acrylic crystal and offers 170m of water resistance. [seikata-wm-375bf844c5ec]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

37mm

Case Thickness

8.7mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

170m

Dial Color

Silver

Jewels

30j

Frequency

36,000 bph

Power Reserve

63 hours

Year

1968

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