No part number or mfr is indicated on the old eyeball. It looks very similar to this www.allpoolsolutions.com.au/Pool-Accessories...
There are no slits to speak of and I'm pretty sure it's just a insider slip version. The whole section that sticks out -- ring, eyeball, threads -- snapped off. The "slip" part is left in the wall (I can feel the end of it with my fingers).
I got a hayward SP1421E to replace one: http://www.1800poolparts.com/Hayward~Directional~Flow~Insider~Inlet~Fitting~1~Opening_152_11375~product.html
which would push in the pipe just fine if I could get the remains of the old one out.
Maybe there's a PVC pipe tool for such a thing when smaller pipes are snapped off into bigger ones? And there's nothing left on the outside to grab hold of? I know I have a smaller tool for that happens to my sprinkler system, just wondering if pool professionals have something for this kind of situation in the pools. I can't be the first!