Help With Very Old USA Banknotes

They are colonial currency, and that's all I can say. They could be real or not, I don't know. Good luck.

I found a 20 shilling note from September 15, 1755 New York. fr#NY-141. Although not a 10 shilling note I believe the date would still be the same. So possibly a start point if someone has the correct reference guide. I did do every year of the 1750's with no positive result for 10 shilling in New York.

I did a quick search - so take this with a grain of salt.
A couple things I see that make me suspect or this note being genuine:
The word SHILLINGS is abbreviated in the border at top of note you present. I do not see an abbreviating on any other note in my first quick pass to find this particular one.
Another thing the line that has the date on it ends in 10 s. Then it appears it restate 10 s. on the next row. That is odd.
The last thing is the "It's" Death to counterfeit - I see examples of 'Tis death to counterfeit, To counterfeit is death, and Death to counterfeit. I did not see anything saying the word "It's"
Design is relatively close to the same as the 20 shilling. Very few changes. During that time period that gives me suspicion as well since the notes were usually pretty unique I think.
Lastly the fact that no 10 shilling from that date comes up in a multitude of search combinations gives me concern pause this is genuine.

So I hope something more positive is found by someone with more time to do a deeper dive than I did and my suspicions are proven to be unfounded.

The first note is very suspect. It seems to me someone tried to stain it to look old. The lines on the back look suspect as well. Other note seems genuine.