Can't say for sure what it was on the F-series, but it was pretty much standard for the letter series, except for the very earlies ones, and certainly was standard in '47.
Two types.
For the magneto-fired tractors, it was a single pole switch with a wire running to the side of the mag. With the button down, the mag was grounded, keeping the tractor from running and stopping it if it was. With the button up, it broke the connection to ground leaving the mag free to fire the plugs. The earliest As and Bs (and maybe the Hs and Ms --not sure of that) had a lever that ran forward to mechanically ground the mag to kill the engine. The switch replaced that setup.
On battery ignitions, it was a two-pole switch. Up, it completed the circuit to provide juice to the coil so it could fire. Down, it broke that connection.
The switch cases and buttons look pretty much alike. The difference is in their guts and function.
The originals and reproductions read OUT --RUN/IN --STOP on top of the button.
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Today's Featured Article - The Rescue of a Fordson F - by Anthony West. Introduction I live in the UK and have for many years restored Fordson tractors (in the main model N's). I have also restored and shown model F's, E 27N's, Field Marshall Series 2, David Brown Cropmasters and the old rey Fergeson T 20. At one time I had seven restored examples which were shown and used in ploughing matches. As most restorers, I have a number of war stories I can relate on a range of topics that may help other like minded and interested people. Perhaps my first p
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