thank you Nicholas,

Fortunately, I'm not looking to buy the lens as I already have one (came with the collection of my dad's). I wonder if I should've kept the oscilliscope that he had. I was just doing a little research and I knew I could count on my APUG friends for information.
The lens I have is the same one as the link I posted. Interesting though, that you would have to move the shutter speed indicator to "B" to close it when shooting a time exposure.

Might be fun to try it out - kinda like a Holga