I think the 1917 is off center by enough to be recognized as such (remember it only needs be off 10% if the coin is before a certain date) but the grade provided it wasn't cleaned or dipped would only be G-4. The right wheat stalk lines and wheat heads are nearly gone so it would be worth the money to slab it. The 55 looks like you have interior cuds caused by the dies. Similar to the LIBIERTY (the BIE) coins also on the 1955's I know I have a 55-S BIE. As for grade the reverse looks Unc. depending on if the shiny areas of the pic and marks on lincoln's check and jaw are wear or not you have an Unc. cent. If the marks are wear then you have an AU. Still you are looking at maybe a buck or two premium for the cuds not worth the 20+ dollars to slab it IMO but it's your money. I've seen people spend the money to put cleaned coins in details holders.
I think he left the "not" out in the sentence, as that worn and a minor ( if considered by the TPG) off center would not make it worth while. Sorry.
The 1955 is NOT a cud, it may just be a die break, like the BIE mentioned, but a cud is where part of the die near the rim breaks away, leaving a "blob" of metal along the rim. The following quote is from Coneca, http://conecaonline.org/content/glossary.html EDIT PS It looks just like post mint damage(PMD) to me.
