NATIONAL...MODEL #111 MICROSCOPE with 3 Objectives 4x 10x 40x

National Optical model 185 microscope

Compound Microscope National Optical & Scientific Instruments Model 106

National Optical Model 131-CLED Monocular Compound LED Microscope 4x, 10x, 40x

National Optical Monocular Corded LED 104-CLED Microscope

National Model 131 Compound Microscope WF10x Illuminated Tested Working

National Optical Model 185 Microscope

National Optical Compound Microscope