I have a Littman, I got it before I started nursing school
. I am not sure what kind it is, it has an egg shaped bell.............or is it diaphragm (I can never remember, the side I use to listen to heart, lung, bowel sounds).
I love it, until one day I had a really hard time listening to heart sounds while taking an apical pulse. I moved my stethescope EVERYWHERE. She was a bigger woman, for the most part all I could hear was lung sounds. I grabbed my CI to make sure I wasn't missing anything. She let me try her cardiac stethescope (not sure exactly what kind of cardiac), I could hear heart sounds perfectly.
I know when I get out of nursing school and finally have a little bit of money I am definately buying a cardiac stethescope of some kind. I am sure it will come in handy quite often. For now my current Littman will have to do.