A question for the cognoscenti here: if I remember my history correctly, no choke boring until 1875 right (WW Greener was 1st on the British side of the pond)? This is a shame because many of the earlier hammer guns are superior for me in several areas (non-rebounding hammers, wedge forends, lighter weight, stunning engraving, etc.) when it comes to hunting with them.

Would it be possible to have a choke tube installed in one of these earlier double guns? I suppose I could make this inquiry to Briley directly but what would the downsides be here (other than committing an abomination of sorts on a classic firearm)?

I really only need one tube with choke.