Antique Marchant KC pinwheel Calculating Machine operating handle part 1920s

Description

handle is in good used condition and comes with the original mounting screw. metal handle measures 2 1/4" long. depth of screw shaft is 5/8". square screw shaft is 1/4" and handle spins well. came off the right side of a marchant calculator stamped V KC for a serial number. Im guessing its the operating handle for adding or subtracting.   thanks for looking