How can I tell what kind of distributor I have?

I have 2.0L with dual carbs and (as I found out earlier today) a Petronix system. I had guessed it was a Bosch 009, but the 009 rotor doesn't fit. In fact, the current rotor didn't clear the Petronix module, so whoever installed it made some modifications to it (see below).

different angle

If its a centrifugal advance only and it 'looks' like the 009 then it's an 050.
Good distributor for us regular folks who cant afford a MAllory.
looks just like a 009, but the cap/rotor are different slightly.
More important, its BETTER than the 009 in every way (advance and curve).
Oh, #'s to identify it are on the side, stamped in.
050 should be the last 3 digits.
-Bob O