In The Collected Works of Alex Elmsley, Vol. II, (1994)Stephen Minch writes, page 58 :
A Flip-over switch invented separately by Henry Christ (Ref. Inner Secrets of Card Magic, page 23) and Tony Kardyro (Ref. Conjurors' Magazine (1949)and Kardyro Kard Konjuring (1955), page 8.)
But for me, it looks like a (good) Drop Sleight Variation and Senor Torino calls it also The T.K.'s One Card Drop Supreme.