Custom saddlery serial number question

[PREs_Rock]

I’m hoping someone here can help me out. I have an older Custom Saddlery Wolfgang Solo. It was my sister’s, her husband sent it to me after she passed away. Anyway, I am trying to decipher the serial number to find out more about it as I am hoping it will fit my new horse (arrives week after next, from Mexico). The serial number is:

18S10.09.06NJ.

Any help would be appreciated.

[sheltona01]

That is not a normal format for their serial numbers. Do you have a picture of it?