Seiko Cal. 4521 - 510

The 4521-510 is a sought-after Solar piece from Seiko's golden era. Powered by the 4521 caliber with 25j jewels beating at 36,000 bph, it delivers a 52 hours power reserve. [seikata-wm-4cc744041da0]

Also known as: Sportsmatic

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

39mm

Case Thickness

10.7mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

160m

Dial Color

Cream

Jewels

25j

Frequency

36,000 bph

Power Reserve

52 hours

Year

1966

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