You can narrow the time by checking the date codes on the pots assuming they haven't been changed. Here's a start on how to date a pot: http://home.provide.net/~cfh/pots.html . I'll take a shot at the model and year, it appears the pickups are single coil p-90s but can't be sure with my old eyes. If I had to make a guess, I'd say it's an SG Pro from around '72. I welcome any correction to that hunch.