Here is a picture on the 111C from this thread, it's priming cup is the same as those sold by Optimus for the Nova/Trangia burner but with a smaller hole. My initial question was, is this original or has it been swapped out by a previous owner? Well the owner's manual that I downloaded from this site lists 9010 and 9011 as priming cup and nut, so it looks to be original but not what I had expected. Here's the stove with a priming pad from the MSR XGK-Ex, a perfect fit. Mike
It is an original prime cup used on late 111C. Early Optimus 111C and 11 Explorer used this type for a short time.
