This is one of the most-difficult-to-find pharmacy implements that I have had the privilege to offer for sale in a long time!
Circa 1890's, this implement is referred to as a "Pharmacy Pill Sorter" and was mounted to the top counter of a drugstore work station.
The instrument has a sliding top for counting or sorting various size pills. The top also slides forward as the machine tilts down. This movement drops the pills into the metal chute for dispensing into the proper receptacle.
This piece has wonderful patina! Wear is commensurate with age and use. The condition is very good with one split to the side and a small piece of metal chipped from where the screw is fastened to the base (see photos).
The instrument measures approximately 18"L x 15"W x 11"H and weighs over 13 pounds. Manufactured by the Arthur Colton Co., Detroit, Michigan; dates to the 1890s. The Colton Co. continued as a manufacturer of more efficient and mechanized apparatus for the drug industry well into the 20th century.