Lets see how this one goes down. Here is an unusual Hambusch shotgun.

Not a side by side, or an under and over but a three barrelled 20 gauge. Also available in 12 and 10 gauge.

Shotgun-Drilling
Cal. 20/76 with long barrels and an interchangeable short barrel for cal. 20/70 Triggerplate action with three times ejector and single trigger, This combination also
be made in cal. 10 and 12 gauge