A close view to the singular Akai GX-77, a six heads machine with quick reverse function thanks to a dual capstan mechanism that spins in opposite directions and where only one pinch roller is used in each way, not both.
This was also the unique reel to reel deck that uses a very curious mechanism to place the tape in the correct heads path.
The GX-77 was the last model made by Akai. It's the younger brother of the GX-747.
It's a three motors machine, two speeds (3.75 ips - 9.5 cm/s and 7.5 ips - 19 cm/s), full reverse with 6 heads and ca handle up to 7" reels.
Can use "EE" tape and has external bias fine adjustement. The difference with any other reel to reel deck is the exclusive system to load the tape, which uses a roller to make the tape go against the heads.