No incendiary round with an inertia firing pin and no design features to make it bore safe is
totally safe to ship." That coupled with age, in my opinion, makes it even less safe. We have one instance on record, from a highly reliable collector in Europe, of a B-Patrone “flaming out” just sitting in his cabinet. It did little damage, just a scorched spot in his drawer, but it probably was not an ignition by the firing pin.
I personally think the original advice of selling locally was sound. If it is any indicator, Woodin Lab keeps all B-Patronen separated from the main collection, in an area where any kind of ignition is not likely to start any larger fire or cause any damage. Check State laws before displaying them at a gun show. In my own state, mere possession is a felony. In most states, I don’t think they are outlawed but I know California is not the only one where they are, or at least, I believe so. I can’t honestly say I am positive, other than for California.
Sorry to be contrary DK, but that is my opinion and I felt it should be said here. I would also say to check with various shipping companies on the legality of shipping them. I am not familiar with that so can provide no information myself.