In both cases the Ulm antler and date are on the frame. What you are calling the "barrel hood" (seen through the ejection port) is in fact part of the frame, not the barrel. It's what I call the barrel "boss", since it is a lug-like projection on the top of the frame which provides a mounting point for the barrel....Picked up a 1978 dated Interarms Import. “HI” and antler on the right side of frame and not on the barrel. Most all PPKS type pistols seem to be date proofed on the barrel hood. Why would this one be different? Just curious.