Hello and thank you for viewing our listing!

For sale we have a Vintage University Sound Mustang Sphericon Tweeter Model MS. This item appears to be in very good condition. It shows little to no signs of prior use and may be new old stock, but since we are unsure of its history we're listing as USED. Please see the listing photographs for more information on the condition of this item. 

We tested this item and it does produce sound and the dial is also working.

The tweeter, dial, hardware, informational card, and box is included.