I was going through some older gear and found a Abu Garcia Revo S reel.  I need to do some work to it and order some parts.  I'm hesitant on offering because I'm not sure which generation revo it is. Is there a way to tell by the physical characteristics of the reel? Or is there a website that describes the different generation  revos? I know it isn't the newest model because I bought it many years ago.  I'm thinking 2012ish... I appreciate any help with this. 

I had a 3rd gen Revo S and I could tell by flipping it over and near the gear box it said something like "RVO 03". Hopefully yours has something similiar or you could just post a picture. A quick google search shows gen 2 and 3 look very different.