Seiko Cal. 6638 - 374

This Spring Drive model from 1978 features a 35mm Two-Tone case. It features a Green dial protected by a Acrylic crystal and offers 50m of water resistance. [seikata-wm-a55d49f47821]

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

35mm

Case Thickness

8.8mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

50m

Dial Color

Green

Jewels

17j

Frequency

21,600 bph

Power Reserve

45 hours

Year

1978

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