Seiko Cal. 5687 - 310

This Solar model from 1969 features a 40mm PVD Black case. With its 21mm lug width and 10.9mm profile, it sits comfortably on most wrists. [seikata-wm-2366dc537820]

Also known as: Sportsmatic, Baby Tuna

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

40mm

Case Thickness

10.9mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

50m

Dial Color

Green

Jewels

31j

Frequency

36,000 bph

Power Reserve

65 hours

Year

1969

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