Solar microscope in case
1780-1800
Microscope of very mixed construction
1801-1830
Solar microscope with rack barrel objective
1890-1810
Unsigned solar microscope in mahogany case
1801-1825
Parts of brass solar microscope in mahogany box (not original)
1775-1800
Unsigned solar microscope with worn worm drive for heliostat and rack barrel focusing
1801-1900