Bruce,
My tires are original and reflect 76 year old tires that have spent their lives outside. Heavily checked and weathered. Three are Firestone's, date coded 1941 and one is a Goodyear dated 1945. For sure one does not hold air, just doesn't look like it.
Being Run Flats they have been suitable for driveway runs while I work out the bugs but are definitely not roadworthy.
I am slowly realizing that I may have to settle for NOS bar-grips, but I figured that I would beat the bush for Ferret tires one last time.
Thanks, Peter
Another issue is that I cannot guarantee what condition they will be in after being removed from the wheels.