I'll offer this;

The Thyssen TAC20, 20-03, TAC50-04... They use these problematic 24volt relays by Fender, and Schrack (blue and brown respectively). They're a pain when a simple problem occurs. SPDT 24VDC. Then the almighty MUTS relay is 120 volts AC, and a few 110 VDC. All are SPDT. I think I have those correctly identified, and I believe they're all the same base, someone will correct me if I'm wrong.
If you need part numbers, they'll have to show later.