The lenses are dating from around 2003, and are kindly loaned by Lensbaby founder Craig Strong. They are extremely basic, consisting of a piece of vacuum pipe pulled through a hole made in a camera body cap, and with an eye-loupe mounted at the end of the pipe. You can see pictures of the beta type in chapter 3 of the Lensbaby history. Basically, this is a bendable thingamabob with a fixed aperture of f/5.6, where focusing is done by bending and sqeezing. I loved it!
I found the lens very intuitive to use, and today marks a sad day as I am shipping it off to the next participant. However, I do have a Lensbaby 2.0 in my camera bag, so no need to feel sorry on my behalf..! If you want to take part, you can find the group here. Tell them I sent you!