Its a 2 hole CLE with 4 holes
It was on the change over between 2 and 4 hole and so is the 2 hole casing but with 4 holes. Very rare!!! Has the improved cooling of the 4 hole (due to the extra holes) but the extra speed of the 2 hole. The later 4 hole casing had a thicker stronger skeg but as a result it lost some speed.