Anyone know what the numbers on the box-flaps signify?
sample showing number 3 [image derived from the box of Aero the Acrobat EUR]:

not the game-pak id code. I already know what each group of letters mean. I'm referring to the number near the pak-id. vide supra number 3.
I have noticed a number on the flaps of SNES scans and my wife noticed numbers on the GameBoy Advance flaps. I thought that maybe the numbers represent regions, year-of-release or genre but I've looked into it and I do not see a pattern. Perhaps they signify box-dimensions/design or printing region/department or printing personnel?
Also, anyone know of a list that identifies which graphics modes are used with SNES gamepaks? id est, Hyperzone utilizes mode 7.
I've been trying to compile a complete list of licensed games for NES, SNES, N64, GameBoy and Genesis/Mega Drive systems. I am trying to include as much info as possible. Thanks for reading and have a pleasant day/night ...