They are brass 1-piece "flatbuttons" from the early post-Colonial era. When seen on those 1-piece brass machine-pressed buttons, raised lettering in the button's backmark dates from approximately 1790 through the 1830s, and indented lettering dates from about 1800 through the 1830s. The term "orange" in their backmark refers to the color of the gold gilt which they were plated with. The term "Warranted" is Brirish-speak for "guaranteed." So, the two saying "Warranted" are British-made, imported into the US before the infant American button-making industry became capable (in the 1820a) of mass-producing this particular type of metal button. The one whose backmark says simply "Gilt" could be either British or American-made.