Seiko Cal. 5240 - 840

The Seiko 5240-840 represents an important milestone in Seiko's 1988 lineup. It features a Blue Sunburst dial protected by a Sapphire crystal and offers 90m of water resistance. [seikata-wm-b2d6916e8a69]

Also known as: Samurai, Tuna

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

40mm

Case Thickness

12.9mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

90m

Dial Color

Blue Sunburst

Jewels

22j

Frequency

36,000 bph

Power Reserve

72 hours

Year

1988

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