Seiko Cal. 7040 - 721

The Seiko 7040-721 represents an important milestone in Seiko's 1976 lineup. Powered by the 7040 caliber with 36j jewels beating at 21,600 bph, it delivers a 69 hours power reserve. [seikata-wm-b1ab7d14abd4]

Also known as: Sumo

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

40mm

Case Thickness

15.9mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

70m

Dial Color

Burgundy

Jewels

36j

Frequency

21,600 bph

Power Reserve

69 hours

Year

1976

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