Not a Jensen like any i have ever seen. Slotted Jensen baskets have 3 rows of slots, and the ends of the slots are distinctly radiused. Also, Jensen built drivers almost always have Jensen ID/date codes on them, even when the OEM vendor's ID or tradename also appeared on them.
The fine screen pattern on the one piece cone, vented dustcap, and doped cloth surround suggest OEM to a fairly high quality speaker system.
The shape of the basket reminds me of some GEFCO, and some early ESS woofers, but those slotted openings don't fit.