This is a set of two pedestal mugs similar to an Irish Coffee mug, made of white ceramic. They're marked "Traditional Americana by Arnart #2767" on the bottom, and feature the colors red, blue, and black.
One of the mugs features a vintage advertisement for The Oldsmobile, and the other is a vintage ad for the Locomobile.
They measure 5" tall, 2.75" in diameter and approximately 4" wide. They come in very good used condition with some light wear, some staining, and a small chip on the foot of the Locomobile mug.