MANUAL BREAST PUMP, American or English, c. second quarter 20th century, measuring 5-3/4″ (15 cm) overall. The hand-blown glass body has a flared conical shape, with bulbous reservoir to one side, and is fitted with a now-quite-hard rubber bulb. Designed expressly to stimulate milk production, and to collect breast milk for bottle feeding, the pump is in fine condition.
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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 firstname.lastname@example.org.