Virginia 15 Spanish Milled Dollars Oct, 7, 1776

Very nice! And welcome!
The engraver of the plates for these notes, Robert Scot, went on to be the first Chief Engraver of the US Mint, and created some of the nation's early coin designs: the Flowing Hair, the Liberty Cap, the Draped Bust.
Your note is signed by B. Dickson and James Wray. The serial numbers were indeed handwritten at the top for each issue; only the statistics of probability speaks against this being Note #1 of the $15 emission authorized October 7, 1776, as opposed to, say, having a digit or two faded over time.
Of course, as the highest denomination of the first series of currency of the Commonwealth of Virginia, of the now-independent United States, it's not unthinkable that someone would have been moved to set aside Note #1...

Thank you for your replies! The condition of the notes I have are not much better. I enjoy the history and I think it is amazing to have in my possession documents that are over 200 years old with signatures of men that were part of our founding fathers. I do not think my sons appreciate that fact just now, but I hope they will feel differently as they get older and have families.

I read a little about the printers of the notes, but I had not researched who did the engraving. Now I will have to do the research..... :) The notes are beautiful. I love the lettering, text, the measures they took against counterfeiting, who signed the notes and how their families helped them accomplish the task, but I'm somewhat of a history buff. I don't want to bore you guys. I would like to make sure I'm not missing something important and move on with my ancestry project. I'll be posting two more!

Thank you in advance for your input!