The owner's manual/operating instructions that I purchased was the original factory document and it was in at least three and maybe more languages. I no longer have it because I sold the tape recorder and included the owner's manual/operating instructions and a service/repair manual that I bought on ebay for the new owner.
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.
Great price, Quick delivery, the document was very usefull A+++++++++++++++
Text excerpt from page 8 (click to view)
Installation
Recommendations
� Carefully choose the mounting location so that the unit won�t interfere with normal driving. � Avoid mounting locations where the unit would be subject to high temperatures, such as from direct sunlight or hot air from the heater, or where it would subject to dust, dirt or excessive vibration. � The illustration below shows a typical installation, however, you may need to adjust the installation, depending on the unit. If you have questions or need additional installation hardware, consult your Blaupunkt dealer. � Make sure the unit is firmly anchored (preferably at both front and back) and does not vibrate.
Mounting Hardware
(1) Sleeve
(2) Mounting Strap and Screw
(3) Release Keys
Mounting The Unit in Most Dashboards
1 Install the Sleeve (1) in the dashboard. 2 Select and bend the appropriate tabs to hold the sleeve firmly in place. 3 A. Attach the Mounting Strap (2) to the underside of the dashboard, using screw. B. Attach the back of the unit to the mounting strap using the support stem bolt and hardware.