Yellow1771

I recently got what I hope to be the deal of the year (for me, anyway). I purchased what I believe to be a genuine 2011 Tissot T-Odaci Chronograph at a local pawn shop for $120. It appears both authentic and darn near brand new. Now this exact model is no longer sold directly by Tissot, so I can't match the model number to get an owner's manual off of their site. My question is two-fold. First, how do I authenticate my beautiful new watch, and how/where do I get a manual for it so I can use it properly? Thanking all of the more experienced in advance for your help.