CD 158.2 base embossed Boston with the patent date and the BO blot out on the dome. The stuff on the bottom and left are reglued fracture lines, but the black blob center right with the tail that looks like a fracture but isn't is a bunch of stuff like a big messy looking tadpole about two inches long with colors that I can only unsavorily describe as snot, bile and blood pudding. There is also a 3 inch [id=174833853; snot loop like a rubber band].