The Apache was a combination dagger, pepperbox, and knuckle duster manufactured and sold in the United States from 1870 through 1900. More pictures and history of this unique pocket weapon at the link.
NEATOSHOP SUMMER SALE: SAVE UP TO 20% OFF ALL T-SHIRTS
Save big on Funny T-shirts, Science T-shirts, Sci-fi T-shirts & more! Ends 7/12/15