[CR] Range of early 80s Campy SR rear?

I used to know this (17 years ago).  At 54, my legs (and memory) aren't quite what they used to be.  (I guess you can blame it on the beer . . . )

What is the recommended max range (freewheel/chainrings) of an early 80s Campy Super Record rear derailleur?  I seem to recall it being able to handle a 14-28 freewheel with 52-42 up front.

(I still run a 13-23/52-41 combo on my Ciocc.)

Thanks,

Steve Whitting
"The Ciocc Cat"
Prairieville, Louisiana USA
Website at http://ciocc-cat.angelfire.com/