02-08-2019, 12:25 AM
That is a Lucas switchboard, with "OFF", "M" and "D" on the left-hand switch. The diagram below, which is a bit confusing, shows "SH" and "+D" on the dynamo and switchboard. I have to admit to knowing nothing about wiring mag engine chummies - mine is a 1929 coil engine - sorry
Rick
In deepest Norfolk
In deepest Norfolk