The series letter alone isn't enough to provide an estimated value. Please post a new, separate question with the bill's date.
Sorry, there is no such bill.
I would like to the current value of excellent condition of 1862 US series 268 1 dollar bill.
C is the highest series letter on a 1953 US $2 bill. The series letter, if any, is next to the date. Please see the question "What is the value of a 1953 US 2 dollar bill" for more information.
Its worth no more than its face value. 2$
Check the date or rather series again. US dollar bills were not made in 1920.
Check the date or rather series again. US dollar bills were not made in 1960.
Check the date or rather series again. US dollar bills were not made in 2010.
No US $20 bill carries a "G" series letter. You may be looking at the Federal Reserve District letter. The series letter, if any, on US bills is next to the date. Regardless, a date is needed in order to estimate a value. Please determine the bill's date and see the question "What is the value of a [date] US 20 dollar bill?" for more information.
There are no U.S. notes with the series date of 1921
nothing
The US printed both $2 and $5 bills with red seals in the 1963 series. Please see the questions "What is the value of a 1963 US 2 dollar bill?" and "What is the value of a 1963 US 5 dollar bill?" for more information.
Check that bill again. There are no $2 bills with a series year of 1979.