Nice bike! It's a 63 to 67 model, the years Schwinn offered coppertone as a color. It could be one of several models. The serial number is on the left dropout, that will narrow it down to the year it mas made. From there, a look at the catalogs may show the model, going by the features. I'll bet it shines up well, Schwinn was known for good quality paint.
It looks like the front fender was changed out way back when sometime, it's longer and the braces aren't Schwinn. It looks like it matches up well though. The rims aren't Schwinn, which could be a plus, you have standard size tires to choose from if you change them out. The handle grips were changed also, they look like an old Huffy type of grips.