To further this discussion a bit, two photoraphs come to mind. One is in Gaddis on page 169 of an old Ward Gay Special. I used to own one like it and it was my first hands on exposure to a Stockman sheath, at least one I surmised was a Stockman. As evidenced in that old file photo, the common Stockman sheath traits of uneven leather cutting and irregualr stitching are visible.

The second photo is on page 46 of Hunt's Randall Military Models. Showing an early 60's model one in an unmarked sheath, the author's opinion is one with which I concur. It is very possibly one of the earliest examples of Maurice Johnson's work.