What does the star on Wm rogers mfg co mean?

The star on Wm. Rogers Mfg. Co. silverware signifies that the piece is made of "extra plate" silver, which is a designation for a higher quality of silverplate. This marking indicates that the item has a thicker layer of silver than standard silverplate, enhancing its durability and resistance to wear. The Wm. Rogers Mfg. Co. was known for producing quality silverware, and the star helps identify its premium products.