3M Littmann Classic II S.E. Stethoscope

This is a 3M Littmann Classic II S.E. stethoscope. It features high acoustic sensitivity and a tunable diaphragm. Includes traditional combination chestpiece with non-chill rim. I don't recall how or or when this came into my possession, but I have never used it. A budding doctor, nurse, or hypochondriac may find it of interest!