Seiko Cal. 7031 - 506

The Seiko 7031-506 represents an important milestone in Seiko's 1991 lineup. Powered by the 7031 caliber with 20j jewels beating at 36,000 bph, it delivers a 65 hours power reserve. [seikata-wm-52208bb26bf4]

Also known as: Tuna, Bullhead

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

40mm

Case Thickness

14.9mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

200m

Dial Color

Cream

Jewels

20j

Frequency

36,000 bph

Power Reserve

65 hours

Year

1991

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