This is the bespoke 1919 Pierce Arrow Model 66-4-A Touring Car, designed by a young Harley Earl and built by the legendary Don Lee Coach & Body Works for Mr. Roscoe C. "Fatty" Arbuckle for the princely sum of $28,000 - equivalent to $445,000 in 2021.
The bare, rolling 1919 Pierce Arrow Model 66-4-A chassis cost $6000, with the remaining $22,000 being for the design and construction of coachwork and interior fittings.
The car on the right is a Mercedes 500K/540K Sindelfingen Cabriolet A like the red car, the car on the left is a Mercedes 500K/540K Sindelfingen Cabriolet B like the blue car.