The nicest original used A body spare tire you will find!

As the Ebay writeup says, it was stored inside so there's no dryrot. The 25 pics include closeups of the sidewalls to illustrate this.

http://www.ebay.com/itm/33126337906...em=&sspagename=ADME:L:LCA:MOTORS:1123&vxp=mtr

And yes, it does hold air.
:)