That fine blade appears to have some cortex remaining on the base. There are some knowledgable folks who believe thats an indication of the Angostura type. Overstreet is all over the board with Angosturas in his 9th Edition so I wouldn't pay much attention to his examples.
The blade could be a bi-point knife but the botom point is koncked off but it's still in exc. condition. I had one repaired that was missing 1/4" on the tip & it was about 4.5" long & look's great bow. The small point is a scallorn.