Most bagatelle games and very early pinballs (like Bally Hoo?
marbles for balls. These are not made anymore, your best bet is to look at flea markets and antique malls, where they are usually inexpensive. Later pinballs, like Bally’s Goofy, used solid colored glass marbles for pinballs. These can be replaced with just about any marble that will work, usually regular sized 5/8″ diameter. Most more mechanized pinballs, like Bally Airway or Rockola’s 1934 World Series, used small steel ball bearings called ‘steelies’, because regular glass marbles didn’t have the physical mass to trip ball traps. Most EM (electromechanical) pinballs also used steelies to work any under the playfield electrical switches, although there were exceptions, like Rockola’s 1936 one ball payout pinball, ‘Credit’. This early EM game used a 1 3/16″ red plastic ball. -Ken The way to determine the original size of the marbles in a game is both easy and difficult. If the game is in original condition and has only had the correct size marbles in it, examine the tracking. Measure