Found this thread primarily by searching about Steyr Puch bikes. (Does the Steyr logo represent an Austrian gunsight... LOL.)

Anyhow, maybe its time to start a thread on bikes made with electrical conduit.
Going back to 1978, the Lawwill Pro Cruiser:
One of the bikes that bridged the gap between BMX bikes and mountain bikes. The frame design was based on frame that Don Koski fabricated from electrical conduit and a Schwinn Varsity frame. Mert Lawwill had Terry Knight of Oakland build the frames. The bikes sold for about $500 new and were made from 1978 though 1980 (approximate run of 600 bikes).