Well.... yes they are Remington cylinders, due to the fact that the whole rig was built for a 51/2 inch and 8/12 inch Remington combo. Notice I did not leave the Remington revolvers in for the photos of the cylinder pouch out of respect.
If anyone is wondering Colt '51 and '60 cylinders will fit the same pouch. Walkers and Dragoons are a different matter. The pocket revolvers would also require a different size.
I fully expected that someone would bring it up and I should have predicted that Richard with his keene eye for detail would be the first.