Not enuff info there to positively identify the manufacturer, but likely made in March 1972. My guess is that it is a CTS, but any number of other US OEMs could have made them
Curvelinear cone, small whizzer, accordian surround all bode well as long as they aren't suffering from stiff surround syndrome. Many of these kinds of drivers really prefr being on an OB, but you'd need to run T/S to really find out.
dave