Seiko Cal. 5615 - 997

This Spring Drive model from 1973 features a 40mm PVD Black case. With its 20mm lug width and 15.0mm profile, it sits comfortably on most wrists. [seikata-wm-e42d343d2756]

Also known as: Tuna, World Timer

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

40mm

Case Thickness

15.0mm

Lug Width

20mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

190m

Dial Color

Navy

Jewels

36j

Frequency

28,800 bph

Power Reserve

42 hours

Year

1973

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