I ran this past Mirror Handcuff expert Mick Hanzlik who says the actor is actually holding a Mirror replica made by collector Ian McColl. McColl provided handcuffs and restraints for the 1998 production. (You can read all about the various Mirror Handcuff replicas HERE.)
Despite this photo, the Mirror Handcuff Challenge was not in the 1998 TNT film. In fact, no biopic has yet dramatized this challenge. Might we finally see the Mirror Challenge in HISTORY's new Houdini biopic starring Adrien Brody?
Johnathon Schaech's Houdini is available on DVD via the Warner Archive Collection.