How “safe” are bank vaults?

tsoupa3

My collection rests in a bank vault but I am worried if the conditions are right.
I am not sure if the humidity is at the right level. What is your experience with bank vault conditions?

I am concerned for my 2 Euro coins, which are made from:

Inner disc: 75% copper, 20% zinc, 5% nickel clad on nickel core

Outer disc: 75% copper, 25% nickel


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IrishMike

More years than I would like to admit I've been a banker. Bank vaults are built to keep folks out and not to worry about the atmosphere. I spent hours inside them counting cash, sweating my a$$ off. They are not climate controlled.

TwoKopeiki

I have heard horror stories about coins kept in the safe deposit boxes developing green and black spotting. Humidity is not often controlled, so I would take precautionary measures to insure my coins are as protected from the elements, as much as I can manage it. Either if it's a 2x2 or slab - I would place it in another non-pvc containing bag(or 2) with silica and a tight seal.

Just my 2 cents...

~Roman

satootoko

Lots and losts of silica gel is required for bank vault storage. I use the canned stuff that can be regenerated by baking, and take fresh cans with me every time I visit the vault.

My in-house safe is also stuffed with silica gel.

wybrit

Some time ago I posted this thread about my experience with a safety deposit box in MN. Luckily, I had two forms of moisture protection in the box. Both had to be replaced.