HIGH POWER BINOCULARS, probably French, c. 1900. The brass system opens from 5-3/4″ to 8-1/2″ (15 – 22 cm) long, the parallel tubes hinged for adjustable calibrated interocular separation. Cleaned but good.
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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 protected]
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