The RICOMAC 1610 is a digital sequencer with calculation functions, and comes with an instruction manual. Power has been confirmed, and it operates without any problems. The RICOHMAC 1610 by Ricoh is a high-spec 16-digit desktop calculator released in 1971. It has 1 memory, measures 250(W) x 330(D) x 93(H)mm, weighs 3kg, and had a price of 126,000 yen at the time. As it is from that era, it naturally shows signs of use, but I believe it is in relatively good condition.