Seiko Cal. 4556 - 242

The 4556-242 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 4556 caliber with 20j jewels beating at 36,000 bph, it delivers a 46 hours power reserve. [seikata-wm-7922a94363ea]

Also known as: Samurai, Tuna

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

15.7mm

Lug Width

22mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

50m

Dial Color

Silver

Jewels

20j

Frequency

36,000 bph

Power Reserve

46 hours

Year

1968

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