Looks like a great addition to your collection. Front site looks correct as are the "squashed chicken" grips a call to Ruger at 603-863-3300 ask nicely for the records department and when you give the nice Ladies there your Serial # They will tell you the ship date and Model( Should be a BKH34X) They will also ask you if you would like a Free Factory letter stating all the information they have for your Blackhawk as well as a reprint of the owners manual and a Ruger catalog. Has it had the safety conversion and if it has did you get the original parts to unconvert it?
Have a letter on the way to them. It is unconverted.