I completely understand where your coming from. I had a few in the bank safety deposit box also and funny out of about say 25 plaques I had only 2 that were affected with a slight warp and slightly tacky and 1 a small bubble and a slight warp. So I immediately took those out and separated them in a different container and repacked the others in a cardboard box and cut cardboard separators between each one and added desiccant bags, then put the all card board container in a baggy in a place where the temp is more consistently not hot or cold, temperate. So far so good with the rest. The 2 that were affected were different than the others, completely a flat plaque with a small lunettes in the corner. The other the bubble was only on the larger lunette part in the center.
That’s one reason I sold my London Playboy plaques, it was to large of an investment to one day open my safe deposit box and find them all ruined. I told the buyer to take very good care of them and keep them dry and cool. I still have the Clermont Club Plaques which remain well off since I changed location and packaging and also the same with the Victoria Sporting Club Plaques I’ve just shown.
I am willing to sell them though so someone else can enjoy them. The Playboys were completely unaffected and so Rare Historic and so beautiful I really hated to let them go, Crown Jewels for sure in any sense of collecting, appeals to all areas of collecting.
Shoot I’m ranting like Garin, ha ha
Torrey