Just some friendly advice - do yourself a favr and invest in a set of tongs and a perf guage. You can get both for under $10 and they are an invaluable tool in protecting the stamps in your collection and in IDing them as well.
If you don't have a stamp related store nearby, try Books-A-Million or a hobby shop. And, you can always get them online at places like Subway Stamp Shop
http://www.subwaystamp.com/ or many others.
Disclaimer: I do not work for, nor do I receive any renumeration from Subway Stamp Shop for my endorsement. I've just had good service and gotten qulity products from them for too many years to think about.
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I realized I should probably explain why I insist you need a pair of tongs. If you handle fine and expensive stamps, or even modern mint stamps, with your bare hands you can transfer oils, grit, gunk, cheese pizza and cat drool to the stamp. This can cause long-term damage. A $3 pair of tongs takes care of the problem and now is a good time to start getting into the habit of using them!