Having just cleaned foam from the 1960s off a number of coins, I would strongly advocate a perfect fitting plastic capsule instead of one with foam boarders. But you have to understand: the difference in materials in the time frame there is huge; we have far better foams and plastics now. But, the flipside of that is that no one has kept a coin in modern foam for 50+ years to see what happened...
Plastic . just watch out for anything with chlorine in it.
Plastic . just watch out for anything with chlorine in it.



















