Some observations about your allwin:
The backflash is different from most examples - perhaps a later model. Most have 'WONDER-POOLS' in big orange letters, top left, whereas yours has 'Wonders' within an arrow and 'POOLS' in an oval logo. Also, beside the 3rd hole down (next to 222), yours says 'DRAW OR HOLD FOR COMBINATION', where usually it says 'BANKER'. Wondermatics were in the habit of re-drawing their artwork when making a new print run for some of their most successful games.