The katara is an Indian push dagger--a knife used in a punching action. This one includes two German flintlock pistols built into the engraved silver handle.
Link -via You're Not Bulletproof | Photo: Gregg Martin Auctions
P.S. Here's another one that's even more finely crafted.
It may be noted that there are two laws in Germany that completely forbid you to own such a thing in Germany. (In Germany no push daggers are allowed and additionally it is alos not allowed to have a concealed weapon, i.e a gun pretending to be e.g. a push dagger).. Even if you would cut off the blade to overcome the first two restrictions, you would still have to proof that you have a need to own this weapon...
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