Need help dating Model 11 shotgun

[1776J]

Hello fellas. I'm new here and still learning so bare with me.

I picked up a very nice Remington Model 11 and am trying to date it.
It has no markings other than the usual Remington name and patent dates on top of the barrel, and "full" on one side of the barrel, and "r.p." in a small oval circle on the other side of the barrel.

What does that indicate other than the barrel having a "full" choke?
Is there a way to date it by the receiver instead? The number there begins, "111xxx"

Thanks in advance to any and all help! Looking forward to learning more!

[Jay Huber]

Your gun dates to 1911. The REP in an oval is a barrel proof mark. Hope this helps Jay Huber RSA

[1776J]

Wow! 1911? That really is much more earlier than I had suspected, very interesting! Is there a book where I can obtain the same info on dating the old Remingtons?

I have heard and read that these are one of the the most indestructive shotguns ever made, so with a date of 1911, would this still be regarded as a good solid shooter to use as a target, clay pigeon, and hunting gun?

Again, thank you VERY much for the insight, as it is much appreciated!

[1776J]

I found two others I was thinking of picking... or at least one of them.

One has a serial number of "89xxx" and looks like it only has a 5 digit serial number. Would this be earlier than the other from 1911 or just another run of numbers in a different sequence denoting a different time line? No other markings that I could see.

The other has the numbers, "241xxx" Choke looks to be marked "cyl"? There is also a "PE3" and what looks to be a "EH3" and an "RN" with a "B" in a circle stamped into the side of the barrel. Does this denote the date of the barrel?

Also, when did they start marking the serial numbers on the sides of the receivers?

Thanks again for all the help and info!