This is the National RX-7700. It was also known as the National Panasonic RX-7700 and the National RS-4360. It featured FM as well as 4 shortwave bands. It has a single cassette and requires 10 D size batteries. It also has some interesting pop-up mics on the top of the box.
It was introduced in 1982. It also had 3 Vu meters, dual antennas, Dolby noise reduction and Normal, CrO2 and FeCr cassette settings. There was a recent sale $836 in May of 2019.