Seiko Cal. 4531 - 383

Seiko 4531-383

The Seiko 4531-383 represents an important milestone in Seiko's 1976 lineup. Powered by the 4531 caliber with 21j jewels beating at 21,600 bph, it delivers a 51 hours power reserve. [seikata-wm-3f2972a4ffba]

Also known as: Monster, Helmet

Specifications

Movement
Quartz
Case Material
PVD Black
Case Width
34mm
Case Thickness
15.6mm
Lug Width
18mm
Crystal
Acrylic
Bezel
Rotating
Water Resistance
200m
Dial Color
Black
Jewels
21j
Frequency
21,600 bph
Power Reserve
51 hours
Year
1976

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