Seiko Cal. 4528 - 713

Released in 1977, the Cal. 4528 with design code 713 was part of Seiko's domestic market collection. With its 22mm lug width and 10.0mm profile, it sits comfortably on most wrists. [seikata-wm-4a23a6fb0bb3]

Also known as: Sportsmatic, Flighty

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

46mm

Case Thickness

10.0mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

180m

Dial Color

Navy

Jewels

31j

Frequency

21,600 bph

Power Reserve

69 hours

Year

1977

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