This is a new current issue Blackout marker light. This is the little marker light that is located under the main headlights of the jeeps. These will fit the M38, M38A1, and M151 series jeeps. These have the later Packard connector (rubber connector) and are 100% correct for the M151 jeeps. These are 24 volt and can be used as 12 volt by simply changing the internal bulb.