From Gary
 
Rodenstock-Apo-Ronar 150mm f9 Lens with Copal-0 Shutter.
 
Mounted on 4x5 Graphic board.
 
One second shutter sounds like one second.
 
The glass looks clean and I see no major defects. But there are some dust specks on the front lens element. 
 
Starting bid is $79.00