WELCH ALLYN 3.5V PANOPTIC OPHTHALMOSCOPE HEAD 11820. The item "WELCH ALLYN 3.5V PANOPTIC OPHTHALMOSCOPE HEAD 11820" is in sale since Thursday, November 09, 2017. This item is in the category "Business & Industrial\Healthcare, Lab & Life Science\Medical Specialties\Ophthalmology & Optometry\Ophthalmoscopes". The seller is "mmeq1965" and is located in Gloucester, Massachusetts. This item can be shipped worldwide.