I've posted this to other forums like UPCCC and Reddit, but no luck so far.
Here is the relatively unknown set on Bulbapedia.
Here are the two cards for a side-by-side comparison.
Bulbapedia and all other cards I have seen are listed as the NO.30 Mew that is on the right.
Yes, this would typically be indicative of a fake for the NO.0 card on the left (no sets I have seen list a NO.0 in the set list).
Anyway, I would write it off as a fake, but for some reason the image of Mew in NO.0 is sharper than the mass reproduced one on the right.
I got this direct from a seller in Japan, but with no information on it.
The prism design is slightly different on the NO.0, but other than clarity difference they're identical in design, thickness, and all other text elements on front/back.
My guess is a printing proof/misprint before the set was produced/released to the public - but it could be a fake that is somehow a better quality than an original.
Here is the relatively unknown set on Bulbapedia.
Here are the two cards for a side-by-side comparison.
Bulbapedia and all other cards I have seen are listed as the NO.30 Mew that is on the right.
Yes, this would typically be indicative of a fake for the NO.0 card on the left (no sets I have seen list a NO.0 in the set list).
Anyway, I would write it off as a fake, but for some reason the image of Mew in NO.0 is sharper than the mass reproduced one on the right.
I got this direct from a seller in Japan, but with no information on it.
The prism design is slightly different on the NO.0, but other than clarity difference they're identical in design, thickness, and all other text elements on front/back.
My guess is a printing proof/misprint before the set was produced/released to the public - but it could be a fake that is somehow a better quality than an original.