Seiko Cal. 4587 - 661

The 4587-661 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 4587 caliber with 22j jewels beating at 36,000 bph, it delivers a 61 hours power reserve. [seikata-wm-e26ce5b1ad0e]

Also known as: Sea Horse, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

42mm

Case Thickness

9.7mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

180m

Dial Color

Blue Sunburst

Jewels

22j

Frequency

36,000 bph

Power Reserve

61 hours

Year

1991

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