I honestly don't think they know, especially the techs. I know they are/were a little flustered over there with Covid. When I asked them about a digital manual to the Schecter Hellraiser head, they literally didn't even have one. To their own amp. So I had to scan my physical copy and I sent it to them. As I'm sure you noticed, the entire release of these amps weren't well thought out and are disorganized lolI did not ask them specifically about my S/N. I was looking more for something like "produced from May 2013 through December 2014, total of x number of units produced" or whatever. I have a theory as to what the actual numbers within the S/N mean, at least for the USA models. I think the first two digits might be year produced, next two might be month, and then the next four would be unit number off the line. Not 100% sure on that - that's just my thought based on how Schecter has numbered other models. I'm really more interested in knowing total quantity of units produced. I don't know why that would be a closely guarded secret - it is what it is. But Schecter apparently didn't want to answer it.