The lack of a letter after the series date simply means it is the first issue of that series. Traditionally the series date is changed when a "major change" is instituted in the bill. Since 1974 a change in the Secretary of the Treasury is considered a "major change" to the bill design. A "minor change," including the changing of the Treasurer, is signified by a letter after the series date. The letters go in alphabetic order beginning with A. See the Related Link "Wikipedia: Series (United States currency)" for more information on currency series dates. See the Related Question "What is the value of a Series 1957 silver certificate" for the value of the bill.
It's called a mint mark and identifies the mint that struck the coin. See the Related Question for more information.
Series letters are handled a bit strangely, and sometimes inconsistently. The first bill in a particular date's series normally does not have any letter, the second one is A, the third is B, and so on.In general the letter is added or changed when a new treasurer is appointed, and a new date series is started when a new Secretary of the Treasury is named or a new design is adopted*.So, the lack of a series letter simply means your bill was from the first run of 1957 silver certificates, before there was a change of treasurers. The A227 is nothing more than a printing plate identifier and doesn't affect the bill's value.If you check the bills in your wallet you should find plenty of more recent ones that don't have series letters either, so the lack of a letter on your 1957 bill should not be a surprise.(*) That's not always the case, though - for example the new orange $10s involved a design change plus a new Treasury Secretary, so there was never a 2004 bill, only 2004A.
"Start" and "end" are not really concepts that apply to vectors.
Depending on condition, about $1.25 to 1.50. A dealer will pay face value. Also, a bill's serial number almost never affects its value. The date, series letter, seal color, and condition are the primary factors. *28359767B worth
Silver certificates don't always have a letter in the beginning of the serial number. They can have a star. Otherwise they all have letters.
re-designation letter
The two letter designation for Canada is CA The three letter designation for Canada is CAN
On modern U.S. bills of $5 or larger, the district is indicated by the second letter in the serial number. The first letter indicates the series.
Please post a new question with the bill's date and what letter if any is next to the date. There were no $5 bills with a "P" series letter; "F" was the highest letter ever used and that was in the 1928 series.
designation
Serial numbers are counters and a security feature but rarely affect a bill's value. In general the date and series letter are much more important. Please post a new question with those details.
It's an extremely common series, worth about $2 on average.
This note is a 1957B series, the date is just below the blue seal.MoreThe series letter is next to the date. There may not be one, or it may have an A or B.
A Bayer designation is a stellar designation in which a specific star is identified by a Greek letter, followed by the genitive form of its parent constellation's Latin name.
You need to provide more information - date and series letter, condition, denomination.
In 1952, the designation or code letter on a Georgia license plate for a pickup truck was A/p.
certificate return letter