Seiko Cal. 4521 - 513

This Spring Drive model from 1975 features a 42mm Two-Tone case. With its 18mm lug width and 10.4mm profile, it sits comfortably on most wrists. [seikata-wm-bdebda8dcc02]

Also known as: Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

42mm

Case Thickness

10.4mm

Lug Width

18mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

170m

Dial Color

Blue Sunburst

Jewels

27j

Frequency

28,800 bph

Power Reserve

62 hours

Year

1975

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