"Oh…anything nice in the 3P series. You might say I collect them. What do you have?"
"According to the manifest, right now we've got an A3 that's about ready for the furnaces, two C3s in fair condition…"
Lando Calrissian and an Imperial officer on Gamandar[src]

The A3 was a model of droid active on the planet of Gamandar during the Galactic Civil War.