What is mason motor?

Unfortunately, as an AI language model, I cannot access up-to-date information about Mason Motor as the company does not have a significant online presence. However, based on available historic information about the company, Mason Motor was a British car manufacturer that was active from 1920 to 1934. Mason motorcars were notable for their unique "underfloor" engine layout, which meant the engine was located beneath the car's floor, rather than under the bonnet. Their cars were also known for their high build quality and luxurious finishes. The company ceased production in 1934 due to financial difficulties.