The game in the manufacturer's flyer shows five pop bumpers while all examples of this game that we have seen show a drop target in place of the 5th pop bumper even while the playfield art behind the drop target still indicates placement for a pop bumper there. The flyer game may have been a sample or test game before the drop target was added for production. 'Daffie' was the first of four Williams game to have zipper flippers. Williams referred to it as "closing flipper action". The replay version of this game is Williams' 1968 'Doozie'.