I bought it and never got it mounted on another lensboard.
The dial to switch it to bulb was on it when I got the lens.
I cant guarantee the shutter speeds but they sound close, maybe the higher speeds sound a little fast.
There looks like there is dust between the elements in the first group and one or two, what look like bubbles and some dust in the rear group.
Comes mounted in a lensboard for some camera.
I don't really know what this would be worth.
So $100 + shipping?
Thanks for looking.