Hi,
A lot will depend on how historically accurate you want to be. The first step is good research. There is a lot of wrong information spread on the internet about dueling pistols, particularly British ones. The fully evolved British dueling pistol by 1780 had fully octagonal barrels, mostly smooth bored, although a few had shallow scratch rifling, most often set or hair triggers, front and rear sights, plain full or half stocks, little ornamentation except engraving, locks of the highest quality and perfect workmanship. The Pedersoli Charles Moore pistols are about as close as you will find to real British duelers but it falls short on historical accuracy and quality compared with those originals. It is an early 19th century style. Go to
www.flintlockcollection.com and view "Best of the Best" and "Cased Pistols". Geoff Walker shows many classic dueling pistols and it is a good place to begin educating yourself about them. John Atkinson's book "The British Dueling Pistol" is also a good place to begin. Cases are another subject altogether. I rarely see any modern made attempts that are correct. Most have compartments that remind me more of TV dinner trays rather than real pistols cases. Usually the hinges, wood, lining, latches, and partitions are all wrong. Cases were not for display, they were for traveling with your pistols and as such, the guns fit snugly and securely within the case. Usually a case came with a stout leather cover to protect it. Below is a photo of original pistols in their case by Barton who previously was a partner with Robert Wogdon. These represent pistols from the late 1780s-1800. Styles changed over time.
These are pistols by Wogdon from the 1780s. They have hair or set triggers but no adjustment screw is visible because it was done by an internal screw set by the gunsmith. Unlike the Italian "Moore" pistols, note that on British guns, the barrel keys always go in from the side opposite the lock, always. Someone put the keys in backwards on the upper pistol. Also note the front and rear sights, which was typical.
Wogdon built the pistols used in the Hamilton-Burr duel, however they were later modified by some other gunsmith. The hair triggers on them were not secret but a well understood normal feature on British duelers. Below is a cased set I made modeled after an original pair of Wogdons, which I examined years ago.
Making a correct modern pair is difficult because no one makes the right locks. I built mine from cast parts by E. J. Blackley in the UK, which copied an original Wogdon lock. No one makes correct trigger guards either, so I had to weld mine. The case is historically correct based on examination of originals and includes the correct wool baize fabric lining. These pistols and case represent Wodgon's style during the late 1780s, By 1800, barrels were heavier and half stocks became the fashion. The pistols may have been more accurate but they lost the lighter, balance, and feel of the earlier pistols. These pistols and case would sell for at least $4000. Keep in mind, original British duelers often cost 20 pounds at a time when a family could live comfortably on 50 pounds annually.
dave