Re: TIre Markings
Could be a '61' or a '19' depending on which way you're looking at them.
Having worked in the tire and rubber industry for a time, my guess is that they are inspection marks. On the sidewall, they were usually chalk or soap stone.
The marks might verify that the raised white letter tire is mounted properly on the wheel...which means... facing outboard.
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Craig S.
"I saw Elvis At 1000 Feet"
John Force.
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