I was making lunch at the same time lol , not sure if there are others with a similar frame, but it is in the ball park , if it is original and a 1851 the serial number places it between 1853 and 54 manufacture http://www.proofhouse.com/colt/index.html
I know this house was on the 1875 plat map but I have no idea when it was built. I did find an amazing 1894 barber half in the same site. Its just a field where a house once set. Love these places
Don't forget that there were many copies of the Colt back then. Manhattan made some that looked pretty much Colts and so did others. The parts to all of them were pretty much made the same way and look very close to the Colts.