Hello Albert.
The 718 on the spoons is the catalog number. The usual function of the letters is to identify the specific pattern, mold and/or mold maker. There are a few 718's with a dot. Wagner made two styles of 718's, one with a rounded handle and the other with the handle distinctly angular. They also made a slotted spoon marked 719. These spoons were sold separately or as a set with a 718 and a 719 called a "Whip and Mix Set" in a marked package.
John