It is a Custom Shop. He said he bought it in mid-200's and loves it.
Here are a few pics of some well known 350's and 350T
Page and his Custom Shop Gibson
Chuck Berry and his 350TN with p-90's
Clapton and Keith Richards with their 350's during the filming of Hail Hail Rock N Roll with Chuck Berry. Note one has Humbuckers and one P90's