Seiko Cal. 4577 - 856

The Seiko 4577-856 represents an important milestone in Seiko's 1972 lineup. Powered by the 4577 caliber with 25j jewels beating at 21,600 bph, it delivers a 43 hours power reserve. [seikata-wm-d39b702d5047]

Also known as: Samurai, Monster

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

10.0mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

130m

Dial Color

White

Jewels

25j

Frequency

21,600 bph

Power Reserve

43 hours

Year

1972

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