 This viewer came with the first copy it has no "branding" logo, but does have the American Optical logo and says "patent pending". This is certainly the type of viewer that came with the book, but is it the original? |
 This viewer came with the second copy. It does have the Stereo Realist logo branding, so it was certainly meant to be used with the book but it still could have been a replacement rather than the original. |