'69, I think, but that was a good year and the first year for that model. '69 Les Paul basses didn't come with an output transformer, so whoever buys it will need an amp with a lot of input gain, but unless something's wrong with it, it'll sound great.
EDIT -- here's a similar bass that's probably in better shape, but for $1250. 12.5 pounds!
http://www.elderly.com/vintage/items/55U-4350.htm