As @stitch has clarified, it is in fact a C-shape Pattern 3.
It just so happens that Pattern 3 has a full row of notes at the same fret and these are the lowest notes of each strings particular set of notes.
This specific aspect of the C-Shape Pattern 3 scale is unique to it. All of the other four patterns have one or more strings whose lowest note is at a different fret to the lowest note on the other strings. Meaning Pattern 3 is the only one of the CAGED patterns that can be played as a whole pattern which incorporates all of the open strings. And when that is done, the root note is at fret 3 of the A string. Which must, by definition, mean that Pattern 3 of the C Major scale is a unique scale pattern on guitar.
See below (lowest notes highlighted with a yellow bar.
4 Likes