Here is a Hemi 40 in good shape, found in south central Illinois. It has a marking in a strange place that I have not seen before. Look towards the top of the "N" in "No 40" Can anyone shed any light on this? Thanks, this picture is posted in response to Bill Meier's random request for a contribution to the forum. I am new to the hobby and don't know much, but you guys are always helpful and add invaluable info for new folks like me. Thanks!