In the late 1920s-early 1930s, Schrade produced this pattern they called a Balloon Jack.
It is quite a handful, at 4" long, with thick convex bone handles, and a seal cap.
The picture of the seal cap gives you an idea of the "full" handle profile.
This has always seemed a rather strange pattern to me -- what was it intended for? What market niche were they aiming for? It amuses me to imagine that it was a doctors pattern for large animal vets.