By the grip, I would say an old Ben Pearson!!!
Nice bow!!! Kind of a hand thumper,but vertualy indistructable..... As for the piece of glass lifting, hit it with a small fine emory board, to take the edge off. Then get some "Hard as Nails" Nail polish & give it a few light coats over the area. This should smooth it out & stop any further lifting.
As for a string, It's probly a 66" bow. I'd get a 64" string & twist it up untill you get the brace height somewhere about 7"-8"... As for material, You can use whatever you want. You're really not going to hurt the bow!!! I've always used B-50 Dacron on my glass bows, but they tell me FF really brings out the performance in them!!!!!
As for weight, it's probly 35#-45# Put it on a scale if you can find one. Or, just try & guestimate it, compared to other bows. Check out my thread, "Pop's Bow... 3-4 pages back.
Enjoy!!!!!