Well it's not Cox that's all I know. The only beam mounted engines Cox made are the Space Hoppers and TD/Medallions. It does seem to use a Cox cylinder and head though. Most likely a home cast case from the looks of it. Oddly enough though it looks alot like the drawing I made a year ago for an idea I had about getting some cases cast for me right down to the webs on the front of the case. Is that moss growing on it
Later,
Tim