It sounds like it could be they have the original blueprints of the first ordered plane but by the time you received the 100th they were different and then it’s

It sounds like it could be they have the original blueprints of the first ordered plane but by the time you received the 100th they were different and then it’s had overhauls and other modifications since. About as useful as a ten year old X-ray for a 25 year old.