Seiko Cal. 4550 - 551

This Solar model from 1977 features a 37mm PVD Black case. Powered by the 4550 caliber with 31j jewels beating at 21,600 bph, it delivers a 43 hours power reserve. [seikata-wm-a85dda8bd269]

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

37mm

Case Thickness

9.1mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

160m

Dial Color

Navy

Jewels

31j

Frequency

21,600 bph

Power Reserve

43 hours

Year

1977

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