okay, so I'm new at all this. Today I bought a great 20 mark 1871a gold Prussian coin and the guy at the coin shop, helped me by putting it into an air-tite capsule. I got home and wanted to take some pix, can't open the damned capsule. What's the secret? Crisco? hammer? bigger hammer? sounds silly but it seems that it should be easy enough to open the plastic capsule. if there's anyone who knows how, lemme know. thanks