Turns out this was not the manual i was looking for. The concertmate 670 keyboard i have is a "Realistic" model made for Radio Shack and none of the diagrams on the owners manual i received matches up. HOWEVER, I must say the service Owners Manual provides was fast and efficient by being available online. The manual was in good readable condition and easily downloaded.
Thank´s for your help, I already recived these manual from you
Text excerpt from page 2 (click to view)
GENTILE CLIENTE
Ci congratuliamo con Lei per avere scelto un prodotto di qualità , concepito per rispondere alle esigenze della vita moderna. La Sua nuova apparecchiatura è coperta da garanzia. Il relativo certi�cato di garanzia lo trova qui allegato. Se dovesse mancare lo richieda al Rivenditore.