Although the loss of physical evidence is unfortunate, it wouldn't be so bad if there was a mechanism for retaining the provenance on the slab - but they rarely do and half the time get it wrong. I bought the original silver strike with the wide raised rim reverse in DNW a year ago which as far as I am aware is the Moore piece with the longest provenance, being ex Carter, Peck, Magnay, Adams and a few anonymous sales since then. Unfortunately for the documentation, it's a superb example, so lost all its tickets once slabbed, which included a Carter ticket when Colin had the coin. Anyway, it's now out of a slab again with a ticket that records all the info.
Still looking for a gilt obverse C with the no legend reverse if anyone knows where the Adams 186 coin is? I haven't seen it since 2013.