Left Drop Lanes
Left drop lanes are Drop Lanes on the left flank of the playfield, feeding the left Outlanes from higher up.
Bally used them on its zipper-flipper machines of the late 1960s, beginning with The Wiggler (1967),[1] where a lane that drops the ball is one more thing for a game already built around the risk of losing it. Williams and Sega each fitted one in the 1970s.