Bernard Bilis published his Watch Watch My Watch on the Stars of Magic, Vol. 6, 1986, video tape. In it, a card under his watch changed into another. The card in Bilis's trick was openly placed there, and not folded. Jay Sankey introduced the idea of the card being folded, and appearing under the magician's watch magically in “A Fold in Time” within 100% Sankey, 1990, Kaufman, p. 39. Norman Beck improved the effect by causing the card to appear under a spectator's wristwatch. Beck's trick is described by Jamy Ian Swiss in Genii, Vol. 58 No. 7, May 1995, p. 513.
See also Coin under Spectator's Wristwatch.