Click to enlarge.
Below is a tintype of Houdini from 1891 which gives an idea of what to expect from an early Houdini portrait. This comes from Doug Henning's Houdini His Legend and His Magic. Even though he looks less like the familiar image of Houdini than the above, there's no mistaking him here.
CAG's "Houdini tintype" currently has 3 bids. The auction house is also offering the "Sweetheart Mine" love letter that I posted about in 2015 and recently sold on eBay for $1,875. That listing can be viewed HERE.
Thanks to Harry Houdini (real name) for the alert.