I will know more after I've had a chance to look at it.
I was actually surprised to see the Ep.IV. EIAJ was pretty much gone by 1978 or 1979. So I was expecting this to be a copy of an early bootleg. Hopefully it's from a broadcast - but I think it is more likely that someone just hooked up their EIAJ to someone else's VHS and for someone unknown reason made an EIAJ dub of it. A dub of a broadcast would be much more interesting.