|
1921 Spencer Portable
Microscope Model 60H
| | 1940 Tiyoda Field Microscope |
| | empty | |
| 1924 Hensoldt, Wetzlar “Tami” Extensible Pocket Microscope | empty | 1970 American Optical Military Microscope |
| Late 1960's Nikon H Portable Field Microscope (manual - Adobe reader) | | 1974 TWX-1 Portable Field Microscope (manual - Adobe reader) |
| Late 1960's Nikon H3 Portable Field Microscope (manual - Adobe reader)
| | (manual - Adobe reader) |