pipeliner, if you are looking a two-barrel pigeon gun I may know where a Holland #2 is located at a pretty good price.
If I can remember in the early thirties Gun Makers in London made sets of guns for the aristocrats to take to Spain after the game season to continue shooting birds and partake in the pigeon rings. I would say that is what this Holland #2 is.
And probably my friend's Boss as well.

Mike Proctor