This is an ADM Teacher manual mechanical pinwheel calculator, manufactured by Archimedes-Diehl-Machine and attributed to the design of Schubert of Rastatt, Germany. The device is housed in a metal casing finished in a sage green hammer-tone textured paint. It features a ten-digit setting register and a sliding carriage that contains both a result accumulator and a revolution counter. The calculator is operated by a manual crank handle fitted with a red plastic grip. The front of the machine is embossed with the ADM TEACHER branding. It is equipped with green plastic knobs for resetting the registers and adjusting the carriage. Yellow inventory stickers with the handwritten number 4582 are located on the front and side of the unit.
11 X 5 X 6 inches.
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