Information on a this Fender 1X15 cabinet?

Just pulled this old fender cab out of my basement. I think it was
made in the late 80s or early 90s. As I said, it has one 15 inch
speaker in it, any stickers or other identifying marks have been
removed. The speaker has two numbers on it: 80B363 and 137 8043. The
covering is black tolex. It's oversized; I think it's a bass cabinet.

It's got what looks like fiberglass insulation lining the inside. The
shape is similar to this cabinet, but it's only got one speaker:
http://www.fender.com/products/search.php?partno=2221200000

I'm looking to find out the speaker impedance, power output, and
possibly what it's worth.