I just took delivery on a 5.5" Colt Bisley made in 1898. Here's some pics from the dealer.
Everything works as a new gun, lock up is tight and positive, the bore is excellent except for a wee bit of leading, but that's been taken care of. The "did I get lucky?" part is the cylinder throats, they seem to measure .454 for five and .453 for the sixth. My 1904 vintage Colt New Service comes in at a pathetic .448-.449 throat diameter. I honestly expected the Bisley to have small throats also. Did I just get lucky, or did Colt actually make em right back in 1898?