Nearly ALL silver certificates were printed with blue seals so you need to be a lot more specific. Please post a new question with the bill's date, denomination, and whether there is a small letter next to the date.
More information is needed because blue-seal silver certificates were issued for many decades and in different denominations. Please check your bill's date and denomination, then look for questions in the form ""What is the value of a [date] US [denomination] dollar silver certificate?"; e.g. "What is the value of a 1953 US 10 dollar silver certificate?"
There were no series letters on 1899 $2 silver certificates. Please see the question "What is the value of an 1899 US 2 dollar silver certificate" for values and other information.
Please see the link below. E 647 is a plate number that does not affect the bill's value.
Please don't assume that every old bill is a silver certificate. If it has a green seal it should say Federal Reserve Note across the top front, not silver certificate. There's more information at the question "What is the value of a 1934 US 5 dollar Federal Reserve Note?"
The blue seal indicates your bill is a silver certificate, a form of paper money discontinued in the 1960s. $10 silver certificates were issued for many years so lease post a new and separate question with the bill's date, and whether there's a small letter next to / under the date. That information is important when determining a value. You don't need to include the serial number, though.
The blue seal indicates your bill is a silver certificate. Please see the question "What is the value of a 1934 A US 5 dollar silver certificate?" for more information.
The blue seal indicates your bill is a silver certificate. Please see the question "What is the value of a 1934 B US 5 dollar silver certificate?" for more information.
It depends on condition. Who signed the note and what is the serial number?
More information is needed because blue-seal silver certificates were issued for many decades and in different denominations. Please check your bill's date and denomination, then look for questions in the form ""What is the value of a [date] US [denomination] dollar silver certificate?"; e.g. "What is the value of a 1953 US 10 dollar silver certificate?"
The blue seal indicates your bill is a silver certificate, a form of paper money issued until the early 1960s. Please see the question "What is the value of a 1935 A US 1 dollar silver certificate?" for more information.
The blue seal indicates your bill is a silver certificate, a form of paper money that was discontinued in the early 1960s. Please see the question "What is the value of a 1934 US 5 dollar silver certificate?" for more information.
The blue seal indicates your bill is a silver certificate, a form of paper money issued until the early 1960s. There's more information at the question "What is the value of a 1923 US 1 dollar silver certificate?".
The blue seal indicates it's a silver certificate. Please see the Related Question for more information.
The blue seal indicates your bill is a silver certificate, a form of paper money issued until the early 1960s. Please see the question "What is the value of a 1935 A US 1 dollar silver certificate?" for more information.
$6 to $9 depending on how worn it is.
The banner across its top and the blue seal indicate it's a silver certificate, a form of paper money that was discontinued in the 1960s. Please see the question "What is the value of a 1935 F US 1 dollar silver certificate?" for detailed information.
The blue seal indicates that your bill is a silver certificate, a form of paper money issued until the early 1960s. Please see the question "What is the value of a 1934 D US 5 dollar silver certificate?" for more information.