All Franklin half dollars were made of 90% silver, but 1957 is not a rare year. In lower grades the coin's value is mostly determined by the value of the silver it contains.
Look on the back of the coin to see if there's a small mint mark letter just above the Liberty Bell. It may be blank or there may be a D.
Numismedia lists the following approximate retail values as of 07/2014:
Circulated:
Very worn condition - $11.50
Moderately worn - $11.85
Slightly worn - $12.19
Almost no wear - $14.40
Uncirculated:
No mint mark (Philadelphia): $16.80 to $720.00 depending on quality
"D" mint mark (Denver): $16.80 to $2670.00
You have a Franklin half dollar - a 1957 proof coin is worth around $25.00.
US$1.25
There were no 50.00 bills in 1957. Your answer is zero.
50$
All silver certificates printed from 1928 to 1957 had blue seals. Please see the question "What is the value of a 1957 A US 1 dollar silver certificate?" for more information.
You have a Franklin half dollar - a 1957 proof coin is worth around $25.00.
There was no silver dollar in the US made in 1957. It might be a half dollar. These are usually worth about $10-15.
US$1.25
There were no 50.00 bills in 1957. Your answer is zero.
50$
A US half dollar with a date of 1979 is a Kennedy half dollar not a liberty half dollar. The coin has no silver and is only face value.
All silver certificates printed from 1928 to 1957 had blue seals. Please see the question "What is the value of a 1957 A US 1 dollar silver certificate?" for more information.
It has a metal value of about $10.
Value is for the silver about $2.50
About $4-5
50 cents.
a half dollar