Schuco Studio 1050 Tin Wind up Car

This is a Schuco Studio 1050 Mercedes.On base it has patent # 2144461 and says it is made in U.S Zone Germany.The wind up mechanism works perfectly but has no wind up key.Car is has porcelain #2 label.Tires are in very good condition also.Car is 51/2 inches x 3 inches wide. Patent # places it from the 1930's. Reversable red to blue wheels.

Feel free to ask questions , I will do my best to assist..