What is the value of an old pair of 2 way Infinite Slope Speakers, Serial #015927

I was confused about that issue of the model # . In the model number field, it simply says "Infinite Slope", no numbers. It’s written on that gold sticker with the statement of the warranty and how to obtain service. No other info is provided. JSE Infinite Slope. They are black with a black veneer.

Were JSE speakers designed by Joseph of Joseph Audio??

Give them to the Salvation army or sell them for $100.00 maybe.