Art. You have a very nice pair of #7's there. Nice sheaths too. Especially the top Clarence Moore sheath with both a translucent and brown button snap.
I would guess both to be made in the 1945-'49 range, judging the peened tang on them both, with the bottom knife with the Heiser sheath just a bit older. Your newer one seems to have a more defined grind line.
Great pair of knives Art.