Hmm . . . quite possible Eric, but I also found this model which is a ZS66SD APO Reducer/Flattener.
http://www.pulsar-optical.co.uk/prod.../flatener.html
See also here
http://www.frontieroptics.com.au/Focal%20reducers.html
Perhaps this is the one that Jerry tested on the Stellarvue SV70ED scope?