The guitar is a Gibson SG Custom (3 pickups). First produced in 1960 (tho it wasn't called an SG yet). It was a thinner, double cutaway version of the Les Paul. It was made famous by Pete Townsend of The Who and Angus Young of AC/DC. The SG is a very smooth-playing guitar.
There is a picture of one on this page:
[link to twtd.bluemountains.net.au]
Wikipedia's page:
[link to en.wikipedia.org]

Regardless of when it was (most likely early 60s), she is an incredible musician. She was using a tube amp with the distortion cranked up a good bit. I was kind of disappointed that the chorus didn't join in and the band was not visible. However, she was a great player with enough skill to put most other players to shame. That is a great video and it is fortunate that it still exists. Thanks for sharing it with us!

If you want to see someone who was, in my opinion, the finest jazz guitarist ever, go to: [link to www.about-django.com]
Django Reinhardt was a gypsy with a crippled left hand, and made the most beautiful swing jazz music I've ever heard. (Also check out Woody Allen's Sweet and Lowdown which is a tribute to him).