Sure Grip Help

I have 2 sure grip units, that Im trying to figure out. 1 has a number of C 30847 cast into it then stamped into it in a different location this number 22685X 2 22 65c. The other is identical except the last digits are 1 16 63a.

I was told they were for a 741 case and I was hoping you sure grip gurus would have a better idea and confirm it for me. Thanks

View attachment IMG_20140818_195825_763.jpg

View attachment IMG_20140818_195945_573.jpg