No1 rolling block receiver ring diameters

[muaddib78]

Ive ended up with 2 receivers now, one is a egyptian and the original one i purchased is unknown.

Egyptian ring measures 1.44" long, 1.04" groove to groove and 97.5" land to land last patent date is APRIL 17TH 1866 E. REMINGTONS ILION NY USA roll mark

Unknown is 1.36" ring with 1.07" grooves and 1" lands

Anyone have a clue what this larger one is? Last patent date is JAN 12TH MARCH 18TH 1874, E. REMINGTON & SONS ILION NY rollmark

Working with ken womack for the correct barrels but im still interested in finding out more info.