Blancpain

I recently purchase a BP Leman Flyback LE from a private seller, and the watch was sold "with box and papers." Although there are no questions about the authenticity of the watch, I am concerned that the papers are not complete and missing something cruci... 

My 2006 Aqualung and 2013 FF both had hang tags with their model numbers on it and also a small print out of rate results and water resistance. I have an older 2000 Leman but the box is in storage so I don't know what came with older models.

Both my watches also came with the empty envelope.