Sharp GF-305
The Sharp GF-305 was sold only in Japan (price 76,800 Yen). It was an upgraded version of the Sharp GF-303. Unlike the GF-303, it has Japanese labelling, a silver tuner dial, white VU meters, mesh tweeter grills, and a metal tape door. It also has 3 extra features: FM wireless microphone capability, adjustable tape speed, and adjustable echo. Also, Sharp claims it produces 2 x 6 watts instead of the 2 x 5.5 watts produced by the GF-303.
It was offered in two colors: Silver (the GF305ST), and dark gray (the GF305SB). It has 16cm woofers and 5cm tweeters. Power is provided by two Hitachi TBA810SH amplifier chips. It weighs 6.6 kg, which is 0.2 kg more than the GF-303.
If you need a battery door, you can buy a 3D-printed one HERE