That's quite a trove you have acquired! Good for you! Chances are the caps will still pop, too.
I had never heard of Leon Beaux caps, and I appreciate the information. I'm familiar with the others, and have a few kicking around, including one tin of Navy Arms musket caps that were acquired shortly before they became unavailable. I do know that caps used to be made and marketed in more sizes than we see now. It was my understanding that #12 caps used to be the most common size, up until some time in the late 20th century. Now you can't get them at all, unless you find some old stock, like
@2 shots did.
I still have a few tins of Alcan #12's from a box of 1,000 (ten tins with 100 caps each), with the original but time-worn wrapper. I recall these were purchased, along with some black powder, from a hardware store in Live Oak, Florida, in about 1967. I think I still have four or five full tins and one partially used. We also have a few old but un-used nipples sized for #12 caps. The #12 caps are a little larger than #11's, maybe with a little more priming compound and therefore a bit hotter, more like the #11 "Magnum" caps, I would guess. The slightly larger size also makes them just a bit easier to manipulate than #11's. I, for one, would like to see the #12 caps come back. I doubt it'll happen, though. At this point, it would be great to see any caps at all back on the dealers' shelves...
Notchy Bob