Tropicals & Tender Perennials: I.D. this Rex please?, 0 by DebinSC

DebinSC wrote:
I received this rex begonia a few years ago as a gift along with an "Escargot". They were both labelled Escargot, but after 3 years, I'm pretty sure this one's something else! :) The leaf shown is about 6" long. Can anyone suggest a possible I.D.? I've searched several web sites and have come up with at least 8 that "sort-of" look like it, but just can't pin it down. Any help appreciated.
Thanks,
Deb