Jandy valve designs seem to be unchanged since the dark ages. Mine are 17 years old and exactly match current ones, but they're not the "space saver" model like yours. Worst case, if you get it apart and the kit doesn't match, the fallback is to buy try a hardware store selling o-rings one-by-one. Grainger is reputed to have a huge selection. For a good size match, a caliper or micrometer is helpful.