Novelty or extended (timed) play version of Williams' 1972 'Travel Time'. No replays awarded. This game is listed in Williams Daily Production Logs as 'Add-A-Ball' but the game does not actually adds balls, it only adds ball time.
Production Run Records for Summer Time:
Production Start Date: Oct-16-1972
Production End Date: Nov-7-1972
Production Run Quantity: 30
First ship date: Oct-18-1972
Last ship date: Jan-25-1973
