Número de serie Gibson error

Buenas compañeros, he comprado una Gibson Les Paul Standard 50s P90 y no puedo identificarla con el número de serie, no sé si lo hago bien, lo he puesto aquí: https://www.guitardaterproject.org/gibson.aspx
Y me da error. Alguien puede ayudarme? Gracias.

Espero que te sirva de ayuda:

The pattern is as follows:
YDDDYBRRR
YY is the production year
DDD is the day of the year
RRR is the factory ranking/plant designation number.

NOTE - Gibson USA goes to a 9 digit serial number in early July 2005..
The sixth number is now a batch number- batch 0 starts at the beginning of the day, and once we stamp 699, the batch number will change to 1. The first 5 numbers remain the same, the last 3 numbers will remain the same. The only difference is the addition of this batch indicator.