Schwinn Stingray NOS Tire and others

[mattjennl]

I have several NOS tires that have been stored since the 70's. No cracks, never used, seemingly in near perfect condition.

Question - how do I determine the manufacture date? I have 2 different tire styles that say SCHWINN STINGRAY. One says GRIPPER SLICK and the other is a STING RAY TRACTOR. There does not appear to be a date code, but not sure what to look for.

Any ideas?

 

[coasterbrakejunkie1969]

I have several NOS tires that have been stored since the 70's. No cracks, never used, seemingly in near perfect condition.

Question - how do I determine the manufacture date? I have 2 different tire styles that say SCHWINN STINGRAY. One says GRIPPER SLICK and the other is a STING RAY TRACTOR. There does not appear to be a date code, but not sure what to look for.

Any ideas?

Either a 2 digit code on a small oval , a 2 letter code or a series of 3 circles quartered and having small dots in some of the quarters

 

[rfeagleye]

Here is what the date codes look like. It will only be on one side of the tire, but there are three potential tire manufacturers, so they might not be the same stamping on each tire.