In doing some research online regarding Wilton Armetale I found that it is NOT pewter it bears a certain likeness to pewter. It is made of a combination of aluminum, pewter and other metals. 

This lot of 8 vintage Wilton Armetale luncheon plates is a great addition to any collection. The plates measure 9 inches in diameter and are made of high-quality metal, ensuring they will last for years to come. These plates were manufactured in the United States, adding to their unique and authentic design. Perfect for collectors or those looking to add a touch of elegance to their dining experience, these plates are sure to impress. All are still in the plastic wrapper never used. See photos.