Here's the Ebay link that I was looking at and then pics of my coin. http://reviews.ebay.com/1970-S-Small-Date-and-Large-Date-Cents?ugid=10000000001665217 I should be looking at the distance between the bottom of the "7" and the mint mark, correct? Thoughts on whether my coin is a small date or large date? My coin is an ungraded proof coin that is being shown within a plastic enclosure...The marks/scuffs are on the plastic, not the coin.
Yes, large date No. http://www.lincolncentresource.com/smalldates/1970Ssmalldate.html Also notice that the "7" has a diagonal crease where the horizontal bar meets the vertical baar. Jim