Tag layouts by broad period
Evidence is strongest for multi-line tags seen around the late 2000s and early 2010s; the transition to single-line markings varied.
| Broad period or layout | Components | Date value |
|---|---|---|
| Older multi-line tag | Style, material, color, EPEV, four-digit year, lot | Printed year can be read |
| Around 2009/2010 transition | Originality wording with a single-line code | Meaning is not publicly decoded |
| Later letter-wrapped code | One letter + 6–9 digits + one letter | No public date key |
| Later digits-only code | 6–12 digits | No public date key |
