How old is this dumper

[Freezerpork]

Does anyone have any idea how old this thwaites dumper is there is no I’d plate thank you

 

[Lincs Lass]

1970,s early 80s , original high tip version instead of the sizzor lift used nowadays

 

[Lincs Lass]

Ausa made one much the same

 

[roscoe erf]

2wd not a lot of use now

 

[snarling bee]

Looks older than that, but what do I know about dumpers.
I would say 1950's Chinese copy

 

[How much]

I think it may be a model 750 and I would say early to mid 80'S