Seiko Cal. 4587 - 378

The 4587-378 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 4587 caliber with 30j jewels beating at 36,000 bph, it delivers a 48 hours power reserve. [seikata-wm-96eed6cd124e]

Also known as: Monster, Emperor

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

42mm

Case Thickness

9.5mm

Lug Width

22mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

60m

Dial Color

Champagne

Jewels

30j

Frequency

36,000 bph

Power Reserve

48 hours

Year

1971

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