His/Her Kreisler Karat Crown HGE Mechanical Pencils with Pepsi Logos

These Kreisler Karat Crown heavy gold electroplated mechanical pencils date back to the 1970’s, or earlier, advertising different Pepsi logos on their crowns (I'm assuming from differing years).

The man's pencil is marked: Kreisler Karat Crown II Heavy Gold Electroplate. And the woman's pencil is marked: Kreisler Kt. Crown II H.G.E., with colored rose flowers and green leaves.

While I know what they are, I don't have any idea the actual year(s) of either.