This strangle little weapon is known variously as the deadly flower, Apache revolver and a few others most likely.
It Consists of a 6 shot, .27 caliber, black powder pinfire revolver, with a swing out mini Kris bayonet, and when folded, the grip can be used a knuckle duster.
The revolver likely had an effective range of about oh, 3 feet due to the lack of a barrel and I highly doubt that the other features were much more useful. Still it is pretty neat.
The Apache name does not actually have anything to do with the Native American tribe, but instead a group of 19th Century Parisian criminals who called themselves " Les Apaches".
A weapon like this was also used in the excellent sci-fi book, The Demolished Man, by Alfred Bester.