For a Joker Poker. Gottlieb part number is A16361. If you've got one with the plunger and link attached, that works too.
WTB: Gottlieb Flipper Crank
WTB: Gottlieb Flipper Crank
WMS: Blast Off, Space Mission, Whirlwind
BLY: Skateball, Viking
GTB: Joker Poker