Here is a 70 fwt, DD mounts, low rings, 36mm objective:
That is a sweet set up. Baco made in Portugal? Looks like a 6x36, as the tube mounting length is better (5.9 inches) on those vs. the infamous 2.5-8x36.
Its a BACO shot show special. Same as the 257 Roberts I just snagged. The 6x36 has lots of room with DD. I don’t think a 2.5-8x36 will fit on a long action. A 4x33 fits, but barely.