I Need Help Identifying Serial Number

[Korus Bows]

Hello all,

I think I have this figured out but I am not sure about some of the numbers.

I am looking at an Ampeg SVT-410 HLN cabinet for sale. The serial number is ASUDL10035. Here is what I think I found so far.

D= domestic US
L= the year 1999

I'm not too sure about the first numbers and the last.

Any thoughts? What month?

Thanks