BGS, I think you are confusing the Briggs date code with the Husqvarna date code. Of course I am nearly through my first pot of coffee already.
Craftsman 917.288570, Serial: 091411A019030 was actually produce September 14, 2011. Where as the Briggs Code: 110907YG is 2011, September 07. One of the quickest installation of a new Briggs I have seen lately in a new Husqvarna mower.
I am fairly certain you will not any this year installed this quick.
Off the to stores as my cabinets are bare this morning but I am having to keep them this way so I stay on my diet; although, I think I ate one of my table legs this morning.