Amazon.com: 3M Littmann Classic III Monitoring Stethoscope with ID Tag - Caribbean Blue Tube, 27 inch : Industrial & Scientific
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3M Littmann Stethoscopes on X: "To register your 3M™ Littmann® Stethoscope, you'll need your serial number, which is found on your chestpiece. http://t.co/ElEnz3HmSl" / X
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