This droid of unknown make was seen in the droid lineup behind R2-D2 and C-3PO at the droid auction attended by Jann Tosh and Yorpo Mog on the planet Tyne's Horky.
The Tyne's Horky droid auction.
behind the scenes
This droid was never seen moving and his feet were never seen in The Lost Prince. As the character image above has been based on a pencil drawing of the character model and not a color image, the color of the feet is just a guess.