Seiko Cal. 6615 - 540

This Spring Drive model from 1987 features a 35mm Titanium case. It features a Black dial protected by a Sapphire crystal and offers 140m of water resistance. [seikata-wm-ef3bef5a3a2e]

Also known as: Tuna, World Timer

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

35mm

Case Thickness

15.5mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

140m

Dial Color

Black

Jewels

26j

Frequency

28,800 bph

Power Reserve

60 hours

Year

1987

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