Not sure if it helps, but I picked up this non-perforated Colavito awhile back, and simply assumed it (and the other cards on its sheet?) bypassed the perforation phase at the Topps factory...
1964colavitostandupnonperforated.jpg
...but it seems the grass may be more limey (and not as dark and rich) than it 'should' be? Not sure, but don't have a perforated Stand-Up Rocky to compare it to. Mine here is also cropped very much like yours, so maybe those two similarities point to them being the products of the same sheet or group of sheets.