Seiko Cal. 4550 - 923

Seiko 4550-923

The 4550-923 is a sought-after Spring Drive piece from Seiko's golden era. The Inner Rotating bezel and 34mm case give it a distinctive presence on the wrist. [seikata-wm-c960b15e3c80]

Also known as: Helmet, World Timer

Specifications

Movement
Spring Drive
Case Material
PVD Black
Case Width
34mm
Case Thickness
13.2mm
Lug Width
18mm
Crystal
Hardlex
Bezel
Inner Rotating
Water Resistance
190m
Dial Color
Silver
Jewels
35j
Frequency
21,600 bph
Power Reserve
54 hours
Year
1988

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