Seiko Cal. 5660 - 317

The Seiko 5660-317 represents an important milestone in Seiko's 1977 lineup. It features a Silver dial protected by a Mineral crystal and offers 190m of water resistance. [seikata-wm-1a26c2606abe]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

44mm

Case Thickness

14.7mm

Lug Width

20mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

190m

Dial Color

Silver

Jewels

32j

Frequency

21,600 bph

Power Reserve

64 hours

Year

1977

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