Seiko Cal. 4577 - 987

The Seiko 4577-987 represents an important milestone in Seiko's 1970 lineup. Powered by the 4577 caliber with 32j jewels beating at 28,800 bph, it delivers a 64 hours power reserve. [seikata-wm-c2b9eaeec4e8]

Also known as: Crown

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

34mm

Case Thickness

15.6mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

70m

Dial Color

Cream

Jewels

32j

Frequency

28,800 bph

Power Reserve

64 hours

Year

1970

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