It looks like a good basic road bike but one that needs a lot of work. Judging by the missing chainring bolt, and dirt this thing needsa good overhaul. I would suspect the chain and possibly the freewheel need replaced. Who knows what shape the bottom bracket could be in.
Is the seat height adjusted for you? I think the frame might be a little small for you.
It seems kind of odd that an SR crank would have Ofmega stamped on it. Maybe they were contracted to make them after the huge success of the Quattro group.
__________________
“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
Sugar "Kane" Kowalczyk