How can you report that a stethoscope is a sprague rappaport type area?

How can you report that a stethoscope is a sprague rappaport type area?
Spragues have 2 tubes from the earpiece all the mode down to the bell. The bell is two-sided with clear diaphragms on both sides. You can find a picture at...
http://www.mdfdirect.com/1_4.htm?gclid=c...
If investigational, look at the box it came contained by.
If old, compare it near pictures in a medical supply catalog or on the 'web.