Seiko Cal. 0731 - 505

The Seiko 0731-505 represents an important milestone in Seiko's 1991 lineup. Powered by the 0731 caliber with 22j jewels beating at 28,800 bph, it delivers a 62 hours power reserve. [seikata-wm-05cea932196e]

Also known as: Tuna, Flighty

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

42mm

Case Thickness

10.9mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

200m

Dial Color

Blue Sunburst

Jewels

22j

Frequency

28,800 bph

Power Reserve

62 hours

Year

1991

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