MC JC86
Negative Nancy.
When analog related supplies from B&H show up with mildew on them. 
Chris101
summicronia
Either that, ... or it got wet.
MC JC86
Negative Nancy.
Most likely: Both.
But since everything that happens regarding film or related accoutrements (used prices, cinematography, an emulsion being created or discontinued) is dissected ad nauseam I thought the moldy box that UPS brought today must have deeper meaning.
I really like your pictures, especially the B&Ws.