after studying this more closely on a pc and not off my phone I would concur that theat it is a mkll burner, there should be R cut outs in the rear dropouts, the stem isnt original, but the pedals are deffo burner ones, chainwheel looks very wrong, depending on what model it should have either a suntour or SR stem, if its stamped on the bottom of the BB 'tange', he's got a money maker there as that would make it an aero pro, most sought after indeed
I would say in conclusion that its a mkll burner with CW style bars [not original] that has be upgraded in the early 90's with a midschool stem and chainwheel, the brake lever looks like the right era DC ones as do the wheels and possibly a matching dc caliper
hope this helps
