Throughout his career, Walter Brennan approached roles in one of two ways: with teeth or without, as he had false teeth. In The Gnome-Mobile (1967), he had it both ways: teeth in for D.J. Mulrooney, and teeth out for Knobby the gnome.
The set of the oversize back seat of the Rolls-Royce, along with the Rolls-Royce itself, are on display at the Gilmore Car Museum in Hickory Corners MI. The museum obtained the set due to the friendship between Walt Disney and the Gilmore family.