Check out the sheath on the left as compared to a known Johnson brown button on the right:
1. Construction / workmanship very similar .
2. Major differences being the snaps, no Randall stamp on the back and "slightly" thicker leather.
3. Interesting similarity: Number stamps on the back.

I've held onto this one because of the "possibility" that it might be a sample Johnson sent to Bo before he was hired on.