Repairing old Inter County football

There's an inner tube in those balls, if you have a look at the panel with the valve in it, if you undo the stitches there the whole bladder will come out, a bicycle repair kit will fix that, then put it back, good darning needle should allow you stitch it back through the holes, if my memory serves me right it's a big orange bladder. I'd say pump it up first, 30 year old rubber isn't going to hold much air anyway so you'll probably just need to replace the bladder.