Gil,
If you have time to plug it in, the LED switch is obvious. With the other two switches, off is usually in the up position and down is on. Your two tone controls are most likely low-pass filters, one for each pickup. The switches are what we call Q switches, and they will provide a small boost centered on the knuckle frequency of the filter, wherever you have it. One easy way to demonstrate this and confirm what goes with what is to turn the switches on and max the volume. Push the balance all the way in one direction and play a note. Then spin each of the filter controls in turn. One of them won't seem to do anything and the other will make a wah-wah like effect. That filter goes with the pickup that is currently active. Flip one of the switches, and if the wah-wah goes away, that switch goes with that filter. Reverse the pan control and the other switch and filter should now be active.
It does seem likely that these are signature electronics and LEDs. I have a bass with similar electronics, but a different body, scale length and only four strings. I wouldn't sell mine for under $3500, maybe as low as $3K if I were desperate for cash. Yours should be worth a few hundred more to the right buyer.