[Mg-t] old tire

[oliver]

This tire was the spare on the car (52 TD) we picked up a few weeks ago.  I
know the car's been in a garage for about 30 years or so; can anyone tell from
these how old the tire is (30 years + is not the answer i'm looking for) btw
yes i know better than to try to use this!  could it be the original spare?
it does not match the others on the car (which yes, i also know better than to
use)

http://www.ranteer.com/davescars/mgtd/DSCN3763.JPG

http://www.ranteer.com/davescars/mgtd/DSCN3766.JPG

http://www.ranteer.com/davescars/mgtd/DSCN3768.JPG

http://www.ranteer.com/davescars/mgtd/DSCN3769.JPG