This stamp is on a driveway apron on the west side of North Clemens Avenue between Vine and Fernwood. The last name is clearly Jones, but I am not entirely confident about what precedes that. It looks like “T.Q.” or at least “something Q” or maybe “something O.”
Unfortunately, with such a common name it is usually very difficult to figure out anything about the contractor, and this is not an exception. I haven’t been able to find anything about a cement contractor named Jones operating in that time period.
Update 3/14/22: I saw this in better light the other day and I am now pretty sure it’s T.D. Jones. Still no luck figuring out who that is.