I'll post photos of the harness in use as soon as it's ready.
The restoration process to date:
Clean the leather with warm water and original Dawn dish soap.
Second cleaning of the leather with glycerine soap.
Conditioning of the leather, twice, with Lexol leather conditioner.
Many thanks go to Polo for an excellent job modeling. Polo is an Off The Track Thoroughbred, OTTB, originally trained for flat racing. He's never worn a harness before!