Congratulations on a fine catch.
To me, the New Service and SAA are Colt's finest revolvers.
The 38-40 is a great cartridge, lending itself to cast bullet handloading. It's idiosyncrasies are well worth the effort.

For the reloader, it's one to take your time with, and watch the details. It's probably not the best choice for the progressive press, high volume guy looking to drive JHPs like the daylights.

Also, what beautiful patina! In some ways, nicer than a mint condition bluing. Thank goodness nobody refinished this baby! Personally, I'd give it a good hand rubdown with a soft cotton cloth and some camellia oil.

And, the price! Wow! What a score.
I hope I get this lucky one day on a New Service.

Jim