Antique Mechanical Calculating Machine - 1901 To Mid 1920’s (Antique Calculator)

Description

Mechanical calculating machine manufactured sometime between 1901 and the mid 1920’s.
(The buttons still work but there is no lever)
(1 key is missing)
(Do not know the exact year but my sources show that time frame)
***Source: Smithsonian.edu (sources attached)***
*** picture of patent attached also***
-Inventor is Joseph Turck, who invented this design in 1898 and got a patent granted for it on February 10, 1903. Manufactured in Providence, Rhode Island by the mechanical accountant company.
(Mechanical calculator, adding machine, antique calculator, antique adding machine, antique factory collectibles)