In the Cremona lexicon, "Style G" refers to the case style, not the
music it plays.  The typical Cremona Style G instrument with pipes
plays a Style "A" music roll.  The taller case provides abundant
space for pipework.  Here is a video of a Cremona G in action:

  https://www.youtube.com/watch?v=58AlPFZo1Yk
 

To my knowledge, no Cremona instruments were originally built to
play the Style "G" roll.  If the DeBence Cremona originally included
percussion, it would have been constructed to play the Orchestral "M"
roll, a Marquette Piano Co. exclusive.  Its stack is certainly not the
usual 58-note "A" roll variety, suggesting it once played "M" rolls.
Look for empty or filled screw holes, indicating that something
formerly there is missing.

Jeffrey R. Wood