Here is that same J.H. Weston single groove LRI with the rusty bracket removed. It took gentle prying, and digging at the rust with a box blade to get them seperated. The LRI has some OLD flakes on the base. They were well rusted over, so they may have been made during installation. This Weston is from the mold which has weak embossing. Note the hole is of one diameter, this is typical on these weakly marked ones. Finished cleaned up LRI photo next.