This is a vintage Banthrico 1902 Rambler diecast car bank, made in 1974. These banks were often produced for various banks as promotional items. They're typically made of cast metal, often brass or bronze-plated, and feature a slot for coins. 

Banthrico was a company known for producing these types of coin banks in the shape of vehicles. These banks were designed to encourage saving and were given out by banks to customers. 

Great patina, there is no key with this bank. Comes from a private collection.