For your consideration is a Stromberg-Carlson Speaker. The model number is 1M 605. The speaker is 6.25” high 5” wide and 5” deep. I believe this is an intercom, but not sure. I’m going to say this piece is rare.
PAIR STROMBERG CARLSON Slimline 12″ Speakers Sound Very Nice EX Cond.
The surrounds and cones are in excellent condition. No breaks. Otherwise both are in excellent condition and Sound Very Nice EX Cond. Authentic Zeiss Ikon. 35mm film photography. Old-school photography.
Stromberg-Carlson Custom 400 Coaxial Wide Range HiFi Vintage 12″ Radio Speaker
On the Internet, people have described this Stromberg Carlson Custom 400 Speaker as a Wide Range, High Fidelity, High Efficiency, (Coaxial 2-Way) Speaker with large Alnico Magnets on both the Woofer and the Tweeter, providing Solid Sound Reproduction across the entire frequency range.