Jonathan, as with most CI manufacturers, the markings on all different types of pieces changed over time. This is just one of the ways we identify the time frames of production, along with other features....(handle styles, pour spout shapes, and................) :)
On these griddles for example, newer Lodge handled griddles could be expected to have additional markings to identify the style, and/ or made in USA, and other logo's (such as the egg logo) on newer also...
Rick, I'd call this griddle a New Style Griddle.
Looking at the old catalogs, the Old Style Griddle appears to be more similar to a "shallow" skillet style, without a skirt around the outside, but more a smooth continuous casting from bottom to shallow side wall.
