I watched the female PC ending credits last night and couldn't help but notice that the vault number on the back of the female PC as she walks away at the end of the cut scene is not 111. It looks like it's 80-something. Does anyone know what the vault number is or why end ending credits wouldn't have vault 111 on the vault suit? Was the vault in the MQ changed at the last minute or something?

Vault 81 is one of the commonwealth's main city locations. Aside from the very beginning of the game nothing significant really takes place at 111 but 81 on the other hand...