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Microscope, possibly for demonstrations but incomplete

1701-1850
Orrery patented 1897 (No.578,108 USA) and 1910 (No.958,139 USA) by Alexander Laing and manufactured by Laing Planetarium Company, Detroit, Michigan.

Orrery planetary model by the Laing Planetarium Company, 1910-1920

1910-1920
Cathode ray tube with Maltese cross on wood

Cathode ray tube with Maltese cross on wood

1950-1970