It looks a bit like a HG Palmer that I have, but I'm not convinced this one is a HGP. Maybe the wheels have been replaced, but I've never seen those kinds of wheels on a HGP before. The height adjustment is also very different to the HGP I have from that era.
The spacing of the badge holes look about right for a typical oval HGP badge from the era. But I am sure other badges may also fit here.
I'm not sure if the paint colours are original, but I've never seen a HGP painted in those colours before.
