When I bought my 300, the PO gave me some extra jets.  One of the needles is stamped "N CH".  It doesn't appear to have a digit between the N and the C.
Is this one of the famous N3CH needles and the second digit stamp is just missing? Or, is there actually a needle that is N CH?
				
			Is this one of the famous N3CH needles and the second digit stamp is just missing? Or, is there actually a needle that is N CH?