Seiko Cal. 0747 - 230

The 0747-230 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 0747 caliber with 19j jewels beating at 21,600 bph, it delivers a 71 hours power reserve. [seikata-wm-790c1bba1060]

Also known as: Sportsmatic

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

37mm

Case Thickness

15.9mm

Lug Width

19mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

130m

Dial Color

Blue Sunburst

Jewels

19j

Frequency

21,600 bph

Power Reserve

71 hours

Year

1971

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