Vintage Chinese Abacus with Instruction Book

vintage Oriental Calculator Abacus with its original box and instruction booklet.  The abacus is a traditional counting tool that performs addition, subtraction, multiplication, and division.  The item features a black wooden frame, brass hardware, and black beads on brass rods.  Examples found online indicate it was produced in the 1960s, potentially by DIC, and often referred to as the "Lotus-Flower Brand".  Excellant condition with instruction book and original box. 9.5"×4.5"