Seiko Cal. 6390 - 668

Seiko 6390-668

This Quartz model from 1972 features a 43mm Hardlex-Coated Steel case. Powered by the 6390 caliber with 33j jewels beating at 21,600 bph, it delivers a 56 hours power reserve. [seikata-wm-d40cc5a23a02]

Also known as: Monster, Shogun

Specifications

Movement
Quartz
Case Material
Hardlex-Coated Steel
Case Width
43mm
Case Thickness
9.9mm
Lug Width
22mm
Crystal
Mineral
Bezel
Coin-Edge
Water Resistance
30m
Dial Color
Green
Jewels
33j
Frequency
21,600 bph
Power Reserve
56 hours
Year
1972

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