Sc#11 is a 3 parale Orange.
I have collected Romania for 11 years, and still not confident to offer a suggestion.
Has some merit, but other points very tricky.
Follow the link to 1862-1864 Romania
then make your own opinion.http://www.romaniastamps.com/
from the link genuine--- then click forgeries
What we need, is a proven clear image of a genuine stamp, so we can toggle suspects.
PS: Your scan is barely passable, you should offer a face scan at best dpi for this forum.