On a visit to my gunsmith today, I saw his latest personal project gun, a Belgian Comblain action with a 34" Badger barrel and chambered in 45/110 2-7/8"
This is an extremely interesting action with the entire trigger assembly being part of the lever that lowers the breach block.
http://users.skynet.be/HL-Editions/comblain/comblain1.htm

Being a Belgian, I do know the action - supposed to be one of the fastest single shot rifles around. Never actually military issue, only for the reserve. It is kinda special indeed... They used to be all over the place 10 years ago, now they're getting rare and expensive.

I know of another gunstore where there is a Brazilian model in .410 shotgun. Can't get the gunsmith to part with it