K2/3 8 -o- ??

K - Kelsey Hayes
2 - plant #2
3 - 1973

8 - August
-o- - valve stem
?? - day of month

H - Heavy Duty (as always)

It does look like there is a faint number stamping by the valve stem - they would be the month & day. If there is a 7-digit part number above the valve stem it is the part #.


3580063 - 15x6.0"
3621956 - 15x6.5"