What is a 1911 e pluribus unum penny worth?
Depending on the mintmark and condition, it could be 20 cents or $250. If there is an "S" below the date, figure at least $15 retail.
Here is the price list for different conditions on the coin:
G-4: 25 cents;
VG-8: 40 cents;
F-12: 1 dollar;
VF-20: 1.50 dollars;
XF-40: 5 dollars; M
S-60: 20 dollars;
MS-63: 50 dollars ( Estimate pricing from the 2006 Red Book )
Also please note that ALL U.S. coins carry the motto "E Pluribus Unum" ("From many, one") so this is not a distinguishing characteristic.
Your coin is called a Lincoln penny, like all other cents minted since mid-1909. Please look at the pennies in your pocket change. ALL of them, as well as all other US coins, have the words "E Pluribus Unum" on them so that's not a distinguishing feature. There's more information at the Related Question.
http://www.pcgs.com/prices/frame.chtml?type=date&filename=lincoln_cent this website might help you out, it seems to be pretty detailed. 1911 is not a rare date for Lincoln cents. In circulated condition, it's worth about 25 cents. A nice uncirculated one is worth about $25 The motto E Pluribus Unum ("From many, one") has appeared on cents since 1909 and on all circulating U.S. coins since around 1916, so this generally isn't a distinguishing characteristic. The most important characteristics are denomination, date…
Please check your coin again and post a new, separate question. No US cent has "LB" on it, and the only N would be in the mottoes or denomination. If there really is a separate LB it was added after the coin was minted. Also, a quick look through your pocket change will show that "E Pluribus Unum" is on ALL US coins so that's not anything that identifies a specific one. There's more information…
With no mint mark, retail is 15c to $2.00 depending on condition. With an S mint mark, 30c to $9.00. With a D, 60c to $15. Also, as you can tell from your pocket change (you DO look at your pocket change, don't you?) all U.S. coins carry the motto E Pluribus Unum so that does not help to identify a coin.