Seiko Cal. 4580 - 237

The 4580-237 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 4580 caliber with 26j jewels beating at 36,000 bph, it delivers a 61 hours power reserve. [seikata-wm-095446dc4ee6]

Also known as: Monster, Bullhead

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

34mm

Case Thickness

8.9mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

130m

Dial Color

Blue Sunburst

Jewels

26j

Frequency

36,000 bph

Power Reserve

61 hours

Year

1966

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