Observed recent format
For three letters followed by six digits, join the first and sixth digits for the month and read the middle four as the year.
| Component | Reading | Example from SUT120162 |
|---|---|---|
| Opening three letters | Internal prefix; meaning unpublished | SUT |
| Numeric positions 1 and 6 | Join to form month | 1 + 2 = December |
| Numeric positions 2–5 | Four-digit year | 2016 |
| Observed prefixes | Responsible interpretation |
|---|---|
| AAS ABA ADM ARO BAE BAL MAE PIR SAL SUT VAE | Examples only; not confirmed factories, cities, or countries |
No dependable public start date for this convention was found. Treat the result as an observed consistency clue, not a manufacturer-certified production record.
