I believe it's a 1/16" diameter pin. On a used handle, it's sometimes hard to see, but it's there - as Gene says, offset from the middle, going from top to bottom. You'll need a small punch to drive it out. Mine was in pretty tight. In fact as I recall, one end had been punched (this isn't the right term, but I can't recall it at the moment) to keep it from coming out inadvertently. We ground it down a little...
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Dale Carter
VCCA #8661
1948 Fleetmaster Convertible