Anything that old isn’t worth buying anyways. Ya can get a great ScubaPro or Atomic 10 year old reg. set for under $100. Why spend extra repair $$ for some old junk. I have some old US divers regs that work. Still they are junk and I am going to get $6. for the brass. Why do you want to die with an old piece of gear in your mouth? And what will the family be thinking at your wake? Probly that great deal you got for the dive gear. Safe Diving !