This really looks like a Linhof bellows to me. Super Tech or Kardan? I could extend it to 20 inches and the linhof extension is 18 inches. It was tested with a bright light in a very dark room. I found no pinholes but it does need a good cleaning.
PLEASE CAREFULLY REALLY READ ALL OF THE FINE PRINT BELOW BEFORE PLACING YOUR BID
I primarily sell used photo equipment. As such it is usually not 100% perfect. I try to advertise items as honestly as I can, but if you are looking for
something that is 100 % perfect it might be better if you buy the item new. Also, I do NOT use stock photos.