I only have one picture of my great great grandfather: http://imgur.com/QW7x6nd
In it, he is wearing a pin on his lapel. I'm not sure if it has any significance or if it was just a fashion thing. We have little to no information about him because he died in a barn fire when he was 30. Thank you in advance for all your help!!
You may want to help narrow down the search. Where is he from, birth year, approximate age when he had this picture taken, profession, etc? Anything you can provide will help figure out what it could be.
You might want to try /r/Whatisthisthing. It is really quite good with this sort of question, if you don't get an answer here.
To help narrow it down, where was he from? Do you have any idea where he would have been living at the time the photo was taken?