Great photos! I had another good look on the weekend and am still intrigued. There are huge runouts on some sections that look desperately hard as free routes (24+?) and I saw no sign of trad or skyhook potential in between the bolts. I have no idea how they drilled the bolts on lead - maybe bathooks that have filled in with dirt again? Or maybe it was rap bolted? So I reckon this has to be a reasonably recent free route (ie Fantini in the 80s/90s). It certainly looks impossible for someone in the 60s/70s.