Harlequin Pottery 50s Forest Green Teapot in spectacular condition. The Harlequin teapot has it all, the design elements are just a showcase of the best the line has to offer. Vintage 50s Harlequin teapots are becoming exceedingly hard to find, especially in excellent condition. Produced for less than 10 years, this example boasts great art deco design and fantastic craftsmanship.