This is a pic of a very rare Model B accessory. This is an Apco oil pressure gauge. The special bracket is designed to clamp to the steering column support bracket and be fastened under the early starter pull cable ferrule. In later cars with the floor starter, it could be bolted to the unused cable hole in the steering column support.
This is very similar to the Model A Apco gauge, and in fact the cardboard box was originally labeled for Model A, but has a 'factory' sticker over the words "Model A" updating it to Model B. This is very unusual, and the only one I have found.