Rarely available, I managed to find a 1972 Telefunken Brochure, one day I'll find a TV.
In due course I'll get the brochure scanned for the "Brochure" section of the website. For a few teasers, the "Acusta" Hi-Fi at the end of the brochure is very impressive.
It will be good if you can find a TV, but I only ever recall seeing one in action as originally they were relatively scarce. Guess what, in my 'yellow-folder' I still have the 1971 Telefunken 709 chassis service manual. It covers PALcolor 740 as referenced in your brochure, also 640T, 720T, 730T, and 760T.
If you need a copy, I will scan and upload when the backlog (caused by Windoze!) has been cleared. Having used Linux for the past 18months, I had forgotten how frustrating M$ is, but will see if the scanner software will work under WINE.