Duplex Coaxial 2 way 12 inch full-range speaker.
The HF and LF sections are mechanically independent drivers. The LF unit has a curvilinear profile paper bass driver that naturally rolls of its high frequency response without the need for a crossover. The HF section is made from Polyester film and uses a capacitor (mounted inside the bass drivers basket) to protect it from low frequencies.
-15 W power rating.
-Frequency response: 30 - 15,000 Hz.
-Crossover frequency 2,000 Hz
-LF resonance 40/45Hz.
-Recommended box: Sealed cabinet of at least 6 cubic feet volume.
There are some excellent close up pictures and information on the Vintage Audio Traders site here
Original brochure here: Hifi Lit (Hifi Lit home)