Which Ruttman is this?

#1
I have an old minibike that looks like a Ruttman Pack Mule or Wild Cat but it doesn't have a jackshaft. The word Wildcat is stamped in the top of the blue vinyl seat and instead of a jackshaft, I have an idler wheel on the LH side and brake shoes that expand inside the sprocket hub. It doesn't look like the frame has been modified, looks original. I've seen a number of different versions of these bikes and am trying to figure out how old this one might be and what model exactly. It seems to have the original Goodyear tires. The original colors were blue with white wheels. Can anyone help me identify this one (sorry, no pictures yet).
Thanks.
 
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