This from Mike Summa:

Hello,
With Midlothian’s rescue truck up for sale, I submit the truck that was replaced by the 1997 Pierce.  It is a late 1960s IHC/Pierce.  If I am wrong, please feel free to share information about it.  Enjoy!
–Mike S.
Midlothian Fire Department history

1960s IHC/Pierce rescue truck from the Midlothian Fire Department. Mike Summa photo