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Amazon.com: 3M 6163 Littmann Cardiology IV Black Chestpiece Stethoscope with 27" Black Tube : Industrial & Scientific
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The Differences between the Littmann Classic II SE and the Littmann Master Classic II Stethoscope by Mariah Evans - Issuu
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3M Littmann Classic III Stethoscope, Rainbow-Finish Chestpiece, black stem and headset, Black Tube, 27 inch - Walmart.com
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