Seiko Cal. 6331 - 397

Seiko 6331-397

This Hand-Winding model from 1973 features a 44mm Hardlex-Coated Steel case. Powered by the 6331 caliber with 27j jewels beating at 28,800 bph, it delivers a 71 hours power reserve. [seikata-wm-9489c06d819c]

Specifications

Movement
Hand-Winding
Case Material
Hardlex-Coated Steel
Case Width
44mm
Case Thickness
15.3mm
Lug Width
22mm
Crystal
Sapphire
Bezel
Coin-Edge
Water Resistance
110m
Dial Color
Blue Sunburst
Jewels
27j
Frequency
28,800 bph
Power Reserve
71 hours
Year
1973

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seikata-wm-9489c06d819c