Digical 40-11 Series-E 8-digit LED desk calculator from the early 1970s. Features constant factor (K) switch, decimal settings (F, 2-5), overflow and minus indicators. Includes operating manual and advertising fold-out brochure. Serial number D-02779. AC powered (117V). Made in Hong Kong (title incorrectly states Japan). Display works, case shows typical vintage wear with small chip on side.