Hi everybody. We own an old Colt revolver that I know nothing about. It's dated Sept 10th, 1850, and it's a six shot. After examining the inside of the barrel for the first time I'm surprised to discover that it has 7 sides. I have a serial number if it helps to value this gun. I have to say I know very little about guns even tho I grew up around them. Any help is much appreciated. Thanx.