Seiko Cal. 6231 - 320

Seiko 6231-320

The Seiko 6231-320 represents an important milestone in Seiko's 1977 lineup. Powered by the 6231 caliber with 31j jewels beating at 28,800 bph, it delivers a 72 hours power reserve. [seikata-wm-90a33c292d04]

Also known as: Sumo, Silverwave

Specifications

Movement
Solar
Case Material
Stainless Steel
Case Width
44mm
Case Thickness
8.4mm
Lug Width
22mm
Crystal
Hardlex
Bezel
Inner Rotating
Water Resistance
160m
Dial Color
Burgundy
Jewels
31j
Frequency
28,800 bph
Power Reserve
72 hours
Year
1977

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