Look under Filon subjects. If you pull off the markers and seen the way AF picked the style of their marker lights, where they install them and installs them with over one inch holes drilled behind them is well.... a set up for a definite water intrusion fail and it will happen eventually. If your not getting this for a salvage price... don't walk, run away. If it was an aluminum frame...you might have a rebuild but with wood you will be shocked at the rot out. Replacing the Filon alone after you tear off the original is expensive....and then you have to find a supplier. The aluminum trim seals, sealer materials, under lament, gluing the new Filon, new screws etc. etc. is a huge job.