To add to Mike's 7:13 AM post, here is a Gun Digest article that discusses both the New Pocket and the Pocket Positive revolvers:
https://gundigest.com/more/classic-guns/classics_coltsnubbie
I have a 1910 Pocket Positive and the article really helped me understand what I have.
https://gundigest.com/more/classic-guns/classics_coltsnubbie
I have a 1910 Pocket Positive and the article really helped me understand what I have.