Seiko Cal. 4531 - 321

Seiko 4531-321

The Seiko 4531-321 represents an important milestone in Seiko's 1980 lineup. Powered by the 4531 caliber with 26j jewels beating at 21,600 bph, it delivers a 40 hours power reserve. [seikata-wm-dc316b4a6ff0]

Also known as: Helmet, UFO

Specifications

Movement
Hand-Winding
Case Material
Hardlex-Coated Steel
Case Width
37mm
Case Thickness
14.7mm
Lug Width
19mm
Crystal
Acrylic
Bezel
Fixed
Water Resistance
190m
Dial Color
Navy
Jewels
26j
Frequency
21,600 bph
Power Reserve
40 hours
Year
1980

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seikata-wm-dc316b4a6ff0