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That might be a very old pipe manufacturer of London named Loewe. However, the mark I have seen on their pipes has been L&Co in an oval.
Here's a good article on the company.
Lowew's is the only London pipe manufacturer that I know of who's mark comes close to Sunnyboy's pipe. If it were a mark used on Loewe pipes the extra C might stand for Cadogan, the company who bought them. This is just a guess on my part, I'm not sure.