Ad from September 1948 for the Vanadium Corporation of America and very clearly the gonzo Griffiths VTOL SST.
From the text:
"This supersonic plane is based on a prototype already in the planning stage. It's calculated that it will cross the
Atlantic in a mere 2 1/2 hours!"
From this site, lots of stuff to see:
Imaging the Future, Bohn, Fortune Telling, The Pulps (https://www.fulltable.com/vts/f/fut/menu.htm)
VANAD_RR_GRIF_VTOL_01.jpg