Now that I have your attention...

I have an outlet in a very difficult area in that a large bookcase is directly in front of it. This is a 240v 3-prong outlet, but there are different types. I need to know exactly what type. I can only reach it with one hand and can barely see it. I was going to use play-doh to press against it to make an impression, but I can't find any. We also don't have enough salt to make our own. Going to the store is not an option right now, but I need to know the type of outlet soon. Any ideas from all you creative and handy people?