My god I think I hit a big find in this mess of stamps. I have it soaking but if I'm right I have a RN-12 2 cents Orange stamp. This is what the stamp looks like.
http://www.rdhinstl.com/rn/i2.htmNow I call it major because this stamp dates to 1867 and was only printed for one month. This would be the oldest stamp that I now own. I am really not sure it it is worth much though. My 2006 Scott shows a price of $250. I'm not sure if this value is for mint or used and of course I'm not even going to try and grade it.
The stamp does have a pen cancel on it. Give me a half hour and I will post this stamp. I have only hit the surface of the stamps I bought today. This one took me awhile to identify because I am way out of my area of knowledge.