It's hard to see from the pretty horrible picture if they are original or not imo. Relabeling (at least somewhat professionally looking) was very rare back in the day I belive, but at the same time, I've not heard of custom denoms on CDI chips before so both options are pretty wierd.
That is almost certainly not a label, and the reason I say that is because the green is off-center with respect to the red (i.e. not in register.) Nobody that I'm aware of is printing labels on an offset press (and it would be ridiculously cost-prohibitive to do so, in small batches) so unless the label was designed to be off-center, that wasn't printed on any kind of short-run printer.