I recently acquired an Austro-Daimler "Inter-10". Its a nice bike, full Reynolds 531 including forks and stays, forged Shimano Dropouts front and rear, and not a single braze-on or cable guide. Mine appeared to be a crappy brown color when I got it, but polished up to be a very deep (and very cool) metallic maroon color which can only be appreciated in person.

Their other model you see, the "Vent-Noir" is coveted by many. If yours is Black, it might be one. I haven't seen one that isnt...hence the "Noir" in the name...Black.

I did some research when I got mine and determined it to be a '76...Everything I read said they were imported in small numbers thoughout the 70's and from 78-81 or so they had a dealer presence in the US before the company went under (or possibly was absorbed) in the early 80's. There's a connection somewhere between the "Daimler's" in AUstro-Daimler and Daimler-Benz (aka Mercedes)