The TGK designator means Retail racket.
All versions use the same mold, TK344.
So far, we had two versions of Gravity Pro: 360+ and Auxetic.
The first version layup was TGK344.1, second was/is TGK344.2.
It has nothing to do with the "string/drill pattern" as mentioned above since the retail (TGK) Gravity pro frames only come in one string pattern.
Also, the code is not "on" the pallet but on the hairpin under the pallets.