I became enamored with these doubles many years ago and acquired most of the parts over time to build a Bedford Co. double in the style of Peter White. Ed Rayl made me a matched pair of .40 cal. barrels, 38" long. One is smooth and one is rifled. I also have a piece of highly figured cherry that Wayne Dunlap had at Friendship one year. The locks are Mantons of old manufacture. I really only need to make the hooked breechplugs and tang to get going on it, but never seem to find the time. I've agonized over several features:
I've observed a number of barrel treatments:
a. barrels joined with a single sight on the rib, double hooks and single tang.
b. barrels joined with sights on each barrel, double hooks and single tang.
c. unjoined barrels with sights on each, double hooks and single tang.
d. unjoined barrels with sights on each, double hooks and double tangs.
I haven't decided which route to take yet. Dual sights preclude the need for any regulation, but interfere with the smooth barrel when used with shot.
Next, I notice yours has a single set trigger rather than a pair of triggers. In this case the single trigger would fire whichever lock is cocked, or both if cocked. Are the sear bars long and overlapped to allow this, or are they mechanically linked by some arrangement? My thoughts were that I would have to make new sear bars because mine aren't long enough to overlap. Alternatively, they could be joined in the center with a short piece of tubing which fit over the ends and joined them.