How to tell if i have a sure grip center??

Ok so im pretty sure i do have the cone style. Also while looking at the gear i found it was stamped 3.55 s. So that would be my 3.55 gears. Also if i spin the gear in one direction both bearings where the axle inserts into the carrier spin in the same direction so it should be sure grip i beleive i am going to try posting a pic in a bit.