I recently got in some Punch Churchills and SLR Serie A. Both from 00. When I took a closer look, a few of them had what appeared to be green mold. I dissected the Punch and found a considerable amount of green mold (I presume it is green mold) on the binder. Might be worht checking your stogies if you got them recently and they are from '00
Here are some pics


Here are some pics




Size of mark/stain/spore would give some indication. Where are the mould experts when you need them?
Must have court it from someone, boom, boom!
Comment