463 / | HD | AMUSEMENT DEVICES: GAMES |
49 | DF | SIMULATED-PROJECTILE GAME, TARGET THEREFOR, OR ACCESSORY {3} |
53 | DF | .~ Coindence detection or indication means (e.g., aim detector, "hit" -indicator, etc.) {3} |
57 | .~.~ Coincidence detection via electrical contacts |