Whats up with the stamped numbers on the back on SNES carts?

[50TBRD]

You know the numebers on the back of the SNES carts that are stamped or embossed, usually a 2 digit number? What do they mean? Are they run numbers? Are they the same on the same title? Are they assigned to one title or to titles. Can you tell different carts just but the that 2 digit number?

[Kitsune Sniper]

I've heard that the number may serve to identify different versions of a game. Nintendo printed different versions with bugfixes and changes so the Game Genie would fail to work... I'm aware that Final Fantasy III, for example, has at least two versions - the second of which fixes the infamous Relm Sketch bug...

[50TBRD]

The reason I asked this is because in this thread,

http://www.digitpress.com/forum/viewtopic.php?t=86326

we've been talking about to different releases on Zombies Ate My Neighbors. I checked the two copies that I have and one has 05 and the other has 07. I was wondering if those numbers would tell the carts apart and let me know that this is the cart that goes with the box.

I checked a couple of other duplicate carts that I have. Stone Protectors, DinoCity(00), Bunswick Bowling(08), Cliffhanger(34), Test Drive II(20), Super Scope 6(07), Clayfighter TE(09) were the same, Street Fighter II(34/11), Wrestlemania Arcade(19/00), Bulls vs Blazers(11/36), James Bond Jr(19/40), Super Ghouls and Ghosts(08/12), Killer Instinct(17/91), Mario Paint(27/12), Mortal Kombat(34/19) were different. Clayfighter and Dinocity I have 3 carts of, all matched.

Dinocity, Cliffhanger, Clayfighter TE, and Test Drive II probubly only had one run. Mortal Kombat, Killer Instinct, and Street Fighter probubly all had numerous runs.

[JLukas]

Not sure what those first two digits are for. But someone found out that if it has a letter after it, it is a different version. No letter is version 1.0. A is 1.1, B is 1.2, etc.