Offhand these are at what i have or used to have and can recall:
On Warner
Whatever Hapenned To Baby Jane (b&w)
King Of Kings
Wizard Of Oz
Casablanca (b&w)
A Streetcar Named Desire (b&w)
Ben-Hur
My Fair Lady
The Exorcist
North By Northwest
Other labels:
Snow White & The Seven Dwarfs
Bridge On The River Kwai
Lawrence Of Arabia
The Ten Comandments
Spartacus
Cleopatra
The Sound Of Music
Fiddler On The Roof
West Side Story
The French Connection
The Godfather Box Set ( 1 & 2)
The Longest Day (b&w)
Guns Of Navarone
A lot of old titles on the Warner label has been restored to some extent. Some titles got excellent digital transfers from well-preserved films, not necessarily restored. A number of them still has some evident film grain and scratches visible during dark scenes like in Fiddler, The Exorcists and on the openning scene in Bridge oin the River Kwai. But overall, nothing objectionable.