Could you please clarify what you mean by "back bottle of the bottle"?
I have seen the batch numbers placed in 2 different ways so far. 1) Etched on the bottom edge at the back of the bottle and 2) stamped in blank ink on the bottom of the bottle.
As it seems with Creed, they change little things so often...from box design, to interior cap colors (I had a GIT black cap with a gray interior piece, which Creed said they did because they ran out of matching pieces!), to batch number locations, to paint styles, and most annoyingly: batch variation (MI is one of the worst. Strong watermelon vs barely any watermelon note in some batches).