Seiko Cal. 4577 - 956

The Seiko 4577-956 represents an important milestone in Seiko's 1966 lineup. Powered by the 4577 caliber with 30j jewels beating at 28,800 bph, it delivers a 50 hours power reserve. [seikata-wm-3a8f6ee3c949]

Also known as: Rally, World Timer

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

35mm

Case Thickness

11.8mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

140m

Dial Color

Navy

Jewels

30j

Frequency

28,800 bph

Power Reserve

50 hours

Year

1966

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