Seiko Cal. 6639 - 717

This Hand-Winding model from 1968 features a 36mm Two-Tone case. It features a Silver dial protected by a Sapphire crystal and offers 190m of water resistance. [seikata-wm-3fefb7efcece]

Also known as: Sportsmatic

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

36mm

Case Thickness

14.7mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Silver

Jewels

31j

Frequency

36,000 bph

Power Reserve

38 hours

Year

1968

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