Seiko Cal. 0731 - 820

The Seiko 0731-820 represents an important milestone in Seiko's 1990 lineup. Powered by the 0731 caliber with 35j jewels beating at 36,000 bph, it delivers a 39 hours power reserve. [seikata-wm-9d0bf7e13505]

Also known as: Arnie, Flighty

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

34mm

Case Thickness

14.9mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

40m

Dial Color

Burgundy

Jewels

35j

Frequency

36,000 bph

Power Reserve

39 hours

Year

1990

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