Seiko Cal. 0731 - 406

Seiko 0731-406

The Seiko 0731-406 represents an important milestone in Seiko's 1974 lineup. Powered by the 0731 caliber with 21j jewels beating at 28,800 bph, it delivers a 59 hours power reserve. [seikata-wm-36f46881eea3]

Also known as: Monster, Bullhead

Specifications

Movement
Quartz
Case Material
Hardlex-Coated Steel
Case Width
44mm
Case Thickness
15.2mm
Lug Width
18mm
Crystal
Sapphire
Bezel
Rotating
Water Resistance
140m
Dial Color
White
Jewels
21j
Frequency
28,800 bph
Power Reserve
59 hours
Year
1974

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