Seiko Cal. 4550 - 561

The 4550-561 is a sought-after Automatic piece from Seiko's golden era. Powered by the 4550 caliber with 23j jewels beating at 21,600 bph, it delivers a 64 hours power reserve. [seikata-wm-8df915c78b2b]

Also known as: Bullhead, Rally

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

14.8mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

190m

Dial Color

Burgundy

Jewels

23j

Frequency

21,600 bph

Power Reserve

64 hours

Year

1976

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