Chopper ID - Please help.

[Vic Lopez]

I'm considering buying this, however I am struggling to ID it. The seller bought it from a family member and doesn't know the origins of it.
he says the only things he has changed are the new tyres.

I just want to know if anyone knows anything about it before I decide to go for a fair drive to view and possibly buy it.

Thanks a lot for any help.

 

[Vic Lopez]

A few more photos.

MarshallUnion? I've had a search and can't find anything. Someone on here must know something, I'm relying on you.