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

AmScope M150 Biological Microscope w/ New AC Adapter, WF25X Eye Piece

AmScope M150C Student Biological Compound Microscope Lab Science Tool Optics

FREY SCIENTIFIC Microscope Model 131 Compound with x-y stage 40-400X Tested!

National Student Microscope Model No.138 Tested Working

National Monocular Microscope 4x 10x 40x Objectives LED Model 210?

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

NATIONAL LAB OPTICAL MICROSCOPE 106 MONOCULAR RANGE 4X 10X 40X