Seiko Cal. 6331 - 578

Seiko 6331-578

This Automatic model from 1973 features a 40mm Stainless Steel case. Powered by the 6331 caliber with 20j jewels beating at 21,600 bph, it delivers a 53 hours power reserve. [seikata-wm-b7ce7adc114b]

Specifications

Movement
Automatic
Case Material
Stainless Steel
Case Width
40mm
Case Thickness
15.3mm
Lug Width
22mm
Crystal
Mineral
Bezel
Inner Rotating
Water Resistance
100m
Dial Color
Silver
Jewels
20j
Frequency
21,600 bph
Power Reserve
53 hours
Year
1973

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seikata-wm-b7ce7adc114b