It's a late-70's Ovation Viper Glen Campbell Bluebird solidbody, custom-made with a 12-string neck and quasi-Adamas blue sunburst - don't forget Glen had an endorsement deal with Ovation at the time, and could get anything he wanted; here's the 6-string version:
FYI the Campbell family loaned the original guitar to Ovation in 2018 for a series of USA Custom Shop recreations, of which only 10 six strings and 5 twelve-string guitars were made...