Autograph Authentication Report
2021 Nintendopes Stickers Open Edition - Artist Mark Pingitore Auto · #17a
Findings
Signature comparison
This card. The signature as cropped from the slab photo (front).
Below, the known examples Crown compared it with. Examples with stronger proof (signed in front of staff, or certified by an independent authenticator) carry the most weight.
Feature by feature
| Feature | This card | Known examples | Result |
|---|---|---|---|
| Overall form and proportions | Abbreviated 'M Pgto'-type form: angular zigzag M with trailing 'l'-like stroke, gap, looped P, compressed remaining letters, long horizontal terminal | R1–R8 all show the same two-unit abbreviated structure with the same relative proportions; R1 is the largest and most expansive | Match |
| Slant and baseline | Moderate right slant; baseline rises slightly into the P, then runs flat along the terminal stroke | Same rightward slant and level-to-slightly-rising baseline in R2, R3, R5, R8; R4 and R6 a bit more upright | Natural variation |
| Letter construction | M made as a rapid sawtooth with a tall left stem; P formed with a descending stem and an upper bowl looping into the following letters | Identical M sawtooth and P bowl-and-stem construction in R1, R2, R3, R5, R8; R7 shows a more compressed P | Match |
| Connecting strokes | M connected to its trailing stroke; pen lift before P; P connects through the remaining letters into the terminal | Same lift between first and second units and same continuous P-to-terminal connection across references | Match |
| Starting and ending strokes | Clean entry at top of M stem; ends in a long, tapering horizontal stroke to the right | R1, R2, R3, R5, R8 show the same tapered horizontal finish; R4 and R6 slightly shorter | Match |
| Line quality and speed | Fluid, confident strokes with no visible tremor, hesitation or blunt stops at this resolution | Comparable rapid execution throughout the reference set | Match |
| Pen pressure pattern | Heavier on downstrokes of M and P stem, lighter on terminal taper | Similar pressure pattern in R2, R3, R8; R1 more uniform as a thinner-line pen | Natural variation |
| Spacing | Distinct gap between M unit and P unit; tight internal spacing after P | Same spacing habit in all references | Match |
| Flourishes and underlines | No separate underline; the extended terminal stroke functions as the flourish | Same: no underline, extended terminal in all references | Match |
| Placement and size | Signed vertically along the left side of the artwork on the red sticker field; sized to fit the margin; does not obscure the title bar | Reference crops do not show card orientation; size relative to card is comparable to R2–R8 sticker examples | Natural variation |
| Reproduction indicators | No halftone/dot pattern visible; ink appears to sit on the surface with natural density variation | N/A | Not assessable |
Examiner notes
Our card is a 2021 Nintendopes Stickers Open Edition artist auto. R2–R8 come from the same issue and likely the same signing period. R1 (Horrorible Kids Series 9 autograph card) is a closely contemporary Magic Marker Art product. No era gap needs to be accounted for. Differences between examples reflect pen (blue vs. black marker), surface color and gloss, and signing speed.
How Crown authenticates autographs: the signature is compared with known examples gathered from Crown's own authenticated cards, independent authenticators and public listings, measured by software, examined by an AI forensic model, and signed off by Crown Grading staff. The decision above is Crown's.
