Quoted:
Never ever heard of any Delft scope being marked ArmaLite. Anyone have any photos?
I would take the Delft if it were for the AR10.
Except for the elusive ArmaLite marked Delft, there seem to be three Delft types
1. Colt 601 type (3x25 ), mounted via scope rings
2. First style Sudanese AR10 (3x25), mounted via threaded hole in bottom
3. Second style Portuguese AR10 (3.6x25), mounted springy thingy on bottom
So, how about that photo.
I didn't notice he said Armalite marked...I assumed he just meant one "for" an Armalite.
No, I don't believe there were any actually marked Armalite––at least none that I've seen photographed.
Personally, though, I'd take any of the variants. The 601 model for my 601, the Portuguese model for my Port, and the Sudanese model for...well, I'd build something around it!