Was it fitted to the aircraft?
According to the file below, it says that tubes should not be refitted. If the tyre was replaced, then I imagine fitting a new tyre would require the fitting of a new tube.
https://www.google.com.au/url?sa=t&r...z6AwuA&cad=rja
I see Dunlop recommend that if the inner tube is stored before fitment, it should be inspected yearly. Also, if it wasn't stored in the manufacturers box, it should be powdered.
I don't know if you can compare aircraft tyres with car tyres, but considering regular
car steel belt radial tyres should be changed every 5~6 years (irrespective of tread wear, I might think twice about fitting something this old.