Historians - Want To Trace Antique Revolver History

Any help you can suggest is greatly appreciated.
I have my great-great grandfathers 1861 Remington Old Army revolver and would like to trace its history. I know the description is accurate because of the patent date. I also have the serial number.
One thing that is slight different from the photos I've found online is the front sight - it's a larger blade than than what's shown on the following downloaded pic.
Any suggestions on how to trace its history is appreciated




Remington1861OldArmy.jpg