Seiko Cal. 6331 - 988

Seiko 6331-988

The Seiko 6331-988 represents an important milestone in Seiko's 1966 lineup. Powered by the 6331 caliber with 25j jewels beating at 36,000 bph, it delivers a 65 hours power reserve. [seikata-wm-912ca97cc248]

Also known as: Panda, Arnie

Specifications

Movement
Hand-Winding
Case Material
Hardlex-Coated Steel
Case Width
41mm
Case Thickness
12.6mm
Lug Width
20mm
Crystal
Hardlex
Bezel
Rotating
Water Resistance
120m
Dial Color
Black
Jewels
25j
Frequency
36,000 bph
Power Reserve
65 hours
Year
1966

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