Seiko Cal. 6690 - 551

This Solar model from 1981 features a 39mm Titanium case. With its 20mm lug width and 12.4mm profile, it sits comfortably on most wrists. [seikata-wm-5d46b28167de]

Also known as: Sportsmatic, Baby Tuna

Specifications

Movement

Solar

Case Material

Titanium

Case Width

39mm

Case Thickness

12.4mm

Lug Width

20mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

60m

Dial Color

Cream

Jewels

30j

Frequency

36,000 bph

Power Reserve

57 hours

Year

1981

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