They could be legit but from what i heard the quality was horrendous so they must be bootlegs or maybe fox and lucasfilm had little care for quality control in HK.
They also have mandarin subs burnt into the whole movie overlaid over the picture since this was a full frame release and not widescreen the subs cannot be below the black letterbox bars.
I have Dark Jedi's Full Frame Faces releases that would be the pan and scan vhs tapes released in 1995, on three dvdr's. I remember when he originally capped them he needed help with finding a way to defeat macrovison an analogue version of what today would be called drm on dvd, hd-dvd and blu ray.
The japan special collection was the very first home video widescreen release, that is it was not a 9th generation widescreen bootleg vhs tape.
there was a scope ken films version of part 2 of their star wars digest, not mentioned in their catalogue. Though how many people had a way to project 8mm film in their homes. The films themselves were cheap and cheaply produced but the equipment to project them at the proper film speed with sound was not. It would have been an expensive hobby even in 1970's terms.