Hydroscape or Ewing or John Deere. If you decide to change the whole diaphragm you better make sure you get the old style or buy a retrofit kit. I don't believe the double beaded diaphragm has been around 10 years yet for that valve. Time flies though. I could be wrong. Seems as though Hardie's was bought out much longer than 10 years. Best bet is to take the diaphragm with you.
Good luck!