Buyer's Beware! This sale is just for pieces of lenses, not complete lenses.
The 12" one has both lenses, front and rear, and part of the barrel. The glass on the 12" one is truly awful. Like it rolled around under the seat of a '52 Ford F-1 pickup for 5 or 6 years. It could image, but there will be a loss of contrast for sure.
It has the rotating front group, but it binds. It rotates from about #3 - #5 iirc. Then it binds.
The 9.5" one is in better shape and the diffusion works very smooth all the way around. But it's only the front group, nothing elses for the 9>5 inch one. Glass on it is also worn a bit, but not as bad as big brother's was.
$110 bucks for them both. No returns. Beware.
