Perhaps this is too old a post to reply to, but ThinkGeek always has a good selection of binary timepieces. Check them out in the binary category (http://www.thinkgeek.com/interests/binary/?cpg=nbi). Looks like they have two wristwatches. I do watch the show, but I have no idea if either is what Leonard (or Sheldon?? You indicate that both wear them) was wearing.