GOOD REPLICA LAENNEC STETHOSCOPE, 20th century. Turned of a fine dense hardwood, the 13″ x 1-3/8″ (33 x 3.5 cm) stethoscope conforms well to the dimensions published by the inventor in 1819 (and see Tesseract Catalogue 34 Item 8), The earpiece and the pectoral bell are gently concave. The bell can be removed as desired, and the stethoscope pulls apart in the center for ease of transport. Very fine.
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David and Yola Coffeen both have enjoyed academic careers, as planetary astronomer and as linguist/educator. But since 1982 (yes, 1982!) they have been full-time dealers in early scientific and medical instruments, under the name Tesseract. Selling primarily by catalogue (over 100 issued so far) they also have a web presence at www.etesseract.com, and can be contacted at email@example.com.