Identifying Polk speakers

I've had a pair of Polk speakers for many years now, that I would like to sell, but I am unable to identify as a specific model. They're a 3-way system (or possibly a 2-way with a passive radiator/woofer), and mounted to the front panel under the grill is a plate that says Polk Audio Monitor Series. Anyone know of a reference and/or site that might be able to provide more specific information? If you prefer, you can reply to my email directly at [email protected]. Thank you.