Seiko Cal. 6331 - 658

Seiko 6331-658

The Seiko 6331-658 represents an important milestone in Seiko's 1975 lineup. Powered by the 6331 caliber with 34j jewels beating at 36,000 bph, it delivers a 45 hours power reserve. [seikata-wm-22224215c22d]

Also known as: Golden Tuna

Specifications

Movement
Hand-Winding
Case Material
Hardlex-Coated Steel
Case Width
39mm
Case Thickness
9.9mm
Lug Width
21mm
Crystal
Sapphire
Bezel
Bidirectional
Water Resistance
120m
Dial Color
Black
Jewels
34j
Frequency
36,000 bph
Power Reserve
45 hours
Year
1975

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seikata-wm-22224215c22d