Nice gun, looks original to me.
To give you a frame of reference, in Dec, 2014, I won Lee Jarrett's Auction and I paid $3,250 for the best Model 29 no-dash with all the fixings that I have ever seen - still to this day. At the time, it was a lot of money, but, the gun is really special, and Lee's reputation/contribution to our hobby and this forum is huge. In 2014, it was probably $250 to $500 more than the top Model 29s were going for. I have not shot it, and I just keep it in the safe and show it off to my buddies. I am sure it is worth more now... Here are a few pics: