Seiko Cal. 0731 - 899

Seiko 0731-899

The 0731-899 is a sought-after Quartz piece from Seiko's golden era. Powered by the 0731 caliber with 34j jewels beating at 28,800 bph, it delivers a 57 hours power reserve. [seikata-wm-1b44a0b882fb]

Also known as: Sumo, Bullhead

Specifications

Movement
Quartz
Case Material
Hardlex-Coated Steel
Case Width
42mm
Case Thickness
13.5mm
Lug Width
18mm
Crystal
Mineral
Bezel
Bidirectional
Water Resistance
190m
Dial Color
Silver
Jewels
34j
Frequency
28,800 bph
Power Reserve
57 hours
Year
1971

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