The Gawler club held their annual Veteran / Vintage run for cars pre 1931 yesterday. 24 degrees Celsius, Perfect.
Some interesting Dodge Brothers vehicles attended.
Are the end diameters the same or different?
If different diameters then they could possibly be what we called “go / nogo” gauges in aircraft maintenance.
Possible uses, bushing wear test. (Lots of bushes on a DB.)
Just a suggestion.
Not sure quite what you mean Phil so I include a couple of pages out of the book detailing the correct way to set the ignition timing for the NorthEast Distributor.
I hope this helps.
Nige.