Here's a picture of the E-body Supershifter III that I use in my Savoy.
It does not use the reverse lockout that most Supershifter units have and this is my second Supershifter that I have owned without the lockout. I really don't know when where or why they made them both ways but in either form they are a very nice H-pattern shifter
At a weekend race once with time trials I made 26 passes without missing a shift So once you get it setup right with good linkage it's hard to beat.
Gus