National Microscope Model 138 Monocular Compound w/ 4x, 10x, 40x Objectives, LED

National Student Microscope Model No.138 Tested Working

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

National Optical Microscope Model 131 Tested

National Optical Microscope Model 131 Compound Optical Monocular Great Shape!

National Model 131 Compound Microscope WF10x 20W Illuminated Tested Working

National Model 131 Electric Microscope *Works* WF10X-18MM

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