Excellent video, thanks for posting.
Perfect for newbies, but they could have included:
- who to contact before buying
- internet sites like MPA.com and MPC.guide
- tiny union logo
- fuzziness of letters
- classicposters were printed with 5+ printing plates, which create very rich color scheme and can be detected with loupe and on four crosshairs bynaked eye
- stamp on back
- rolled very rare for older MPs