I wouldn't call them a driven bird matched pair. But the biggest mistake I've made in all of my gun dealings was when I bought my 16/20 combo repro.
The original owner had bought him and his son an identical set of 16/20 guns. Both had the same type, color and figure of wood. All barrels sets were choked the same "Q-1/Q-2 and they were consecutive serial numbered. At the time I could have bought both guns for $8000.00 and in my shortsighted stupidity only bought the one gun. At the time I couldn't imagine why I would want two guns identical to each other.
This one has haunted me for a long time now to say the least!!!
Oh did I mention that these are double trigger guns to boot!!