determining if false ... (faux)

1. imitations show irregularities in the frame lines. (askew)... using metrics software I have discovered V/H variances between positions ... i.e. no standard size exist as genuine.
2. compare image to that of genuine example ... and look for sanko marks ...
3. TC : torn or cut perforations :  no booklets were issued; imitations often show cuts to perfs.
4. multistrike cancels are rare on genuine, more common on reproductions
5. negative image :  the genuine inks are more transparent, than imitations (opaque) ...  look for extraneous dots from tooling or air bubbles in ink on imitations