As mentioned earlier, you'll need a photo of the bearing edge to be sure of the shell lay-up. I've attached some images that may be of some use to you, to help you gain some experience in identifying the different lay-ups.The first image is of a Ludwig three-ply shell, and you'll notice that the re-ring (reinforcement ring) is present, along with identifying the 3 types of plys that make up the shell.The other images are of different Ludwig lay-ups, but as they become greater than 3-ply there is no further structural/strength need for the re-ring. As has been stated before, those pointy B/O badges certainly lead one to a 3-ply conclusion. Next would be figuring out the veneer species that make the shell lay-up.
Those are great pictures illustrating the different plys! I could have easily missed a ply or two in those pictures without the numbers on them. Very helpful! Thanks.