Seiko Cal. 0740 - 230

The Seiko 0740-230 represents an important milestone in Seiko's 1977 lineup. Powered by the 0740 caliber with 36j jewels beating at 28,800 bph, it delivers a 65 hours power reserve. [seikata-wm-17e7b2ae812c]

Also known as: Sportsmatic

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

37mm

Case Thickness

10.8mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

70m

Dial Color

Navy

Jewels

36j

Frequency

28,800 bph

Power Reserve

65 hours

Year

1977

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