I have been on the lookout for a reasonably priced 18 pounder in the US for well over a year now. They do pop up on auction sites regularly, as well as the No. 80 fuses. I was able to pick this up affordably because the previous owner did not remove the surface rust to see all the wonderful markings. Both the fuse and shell are made by BSC. It is my understanding that this is Bethlehem Steel Corporation.