The numbers you have are batch numbers and not the easiest way to tell what you have. The office help would not be pleased with me if I have them looking up batch numbers.
I can give you a few measurements that will help
If it is a Remington converter the length of the cylinder from the back of the ratchet to the muzzle of the cylinder will be
Uberti 1.98"
Pietta 2.00"
If it is a Colt converter the length of the cylinder from the back of the ratchet to the muzzle of the cylinder will be
Uberti 1.83"
Pietta 1.87"
Let me know if you need anything else.
Raven AKA Jay Strite
Kirst Konverter LLC