Seiko Cal. 6331 - 320

Seiko 6331-320

Released in 1997, the Cal. 6331 with design code 320 was part of Seiko's domestic market collection. Powered by the 6331 caliber with 30j jewels beating at 36,000 bph, it delivers a 52 hours power reserve. [seikata-wm-2ac462b3a5b7]

Also known as: Baby Tuna

Specifications

Movement
Automatic
Case Material
PVD Black
Case Width
37mm
Case Thickness
11.5mm
Lug Width
20mm
Crystal
Mineral
Bezel
Inner Rotating
Water Resistance
90m
Dial Color
Black
Jewels
30j
Frequency
36,000 bph
Power Reserve
52 hours
Year
1997

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