I seem to be stuck in the late 1860s-1870s for cartridge guns. The oldest at the moment is a 16 bore Stephen Grant shotgun from one of his first years as an independent maker, 1867-68. It passed nitro proof in London in the early 1990s, too!

Then there's an 1868 Trapdoor Springfield and a couple of Mk.III Sniders, one military trade pattern and the other an original sporter.

The oldest double rifle is an 1879 vintage oval-bored Lancaster in .450 3-1/4" which went with me to Zambia in '99.

Nothing like 'em these days...