How old is this tire?

Would have been a 3 digit code, if the code in the oval is w53379 then the last three, 379, means the 37th week of the 9th year. They didn't plan on the tire being around more than a decade. If that's the code and it was on a car in '93, that would mean '89. Info here Determining the Age of a Tire

Point is pretty much moot, if it's over 10 years old you shouldn't run it.