1875 colt 45 Peacemaker

Dear Sirs,
I have what I believe is a Colt 45 SAA Peacemaker. It has "pat Sept. 19, 1871, July 2-72, Jan. 19-75" on it. Serial #72247. This gun has been in my family for 134 years. Unfortunately, my father passed away suddenly without telling me anything about the gun and any information I have is from internet research. It has hard rubber grips, but wouldn't the original grips have been wood? Also, I read there should be 5 matching serial numbers-where would they be? Also, it has a 7 1/2" barrel. Any information you could provide me with would be greatly appreciated.
Janice

hello and welcome to our boards,, i'll take a shot on this one ,,i'm not a colt collector but from the research i've done with your information heres what i've found ,,it sounds like you have a cililian single action army model made in 1881,,in 1883 colt used the hard rubber grips on the saa's up till around 1897.. they had an eagle with a sheild ,,after serial #165,000 they changed over to hard rubber grips also but the grips had the rampant colt on them,,so your pistol could be correct if they have the eagle and sheild ,,or they just may have been changed at some time for the more modern grips ,,in either event your colt is very valuable and you should either contact colt for more info or seek out a qualified antique firearm apprasier for insurance purposes ,,to give you some idea of values ..my 2008 books say for your model prices could be from 6,000 poor- 30,000 excellent but yours could fall anywhere in between or even possibly be higher,,just depending on the history behind it,,so it's worth investing in a colt letter of authenticity and the history behind it ,,your dad left you a very nice heirloom!!..
bigcurt

Dear Sir,
Thank you for your kind reply and I'm sorry I wasn't more specific in my letter. The grips are not the ones with the eagle and the shield. My mother, who is in her 80's, believes her father replaced them as they were in bad shape. She thinks the old ones were wood. The story is they belonged to a great grandfather who was a Texas Ranger. Also, the top of the barrel has "COLTS PT. F. A. --G Co. ------ CT. USA"
(the spaces are letters that are worn away) I'm attaching a photo and again thank you. Any information you are able to supply is greatly appreciated.
Janice

I think it's actually late 1882, need better photo's for valuation and possibly close-ups after that but this is almost certainly refinished.

photo