I have several silver certificates and was wondering the value of them. They are as follows :
1935F U22279783I Crisp no creases
1935E P70365905I Crisp no creases
1957 V23611784A Crisp no creases
1957 B S94405043A Crisp no creases
These are crisp but have been creased slightly
1957B V77175903A
1957B W94250660A
1957B V94531606A
1957B S94405043A
1957A Q85513779A.
1957A A12324443A
1957B W36863855A
These are worn but no tears
1935F T21738434I
1935G D43082935J
1935G D43545598J
1957 *88647404A
1957B T43525033A
1957B X31993620A
1957 S08766519A
This one has been torn a taped togeather
1935B J58326517D

Why do some of my silver certificates have the same year but different secretary of treasury on them and not even the secretary that served that year