[CR]Mafac brake lever question

I found these brake levers in a box and was goin to use them but I can't seem to figure out how they work. The have an alloy body and a white/yellow plastic lever with a sideways bend in the lever. I thought these might be for top of a drop bar mounting, nope. Then I tried bottom of the hooks, didn't really work. Next was on some 3-speed touring bars, would have mounted too far up the curve to work well. Lastly I tried to mount them on some B'stone arc bars and they don't seem half bad there. What are these things and how were they meant to be mounted?

thanks, Brandon"monkeyman"Ives

Brandon and Mitzi's-- "Wurld uv Wunder" http://darkwing.uoregon.edu/~capybara/

Monkeyman's on going bicycle part garage sale <<<NEW LISTINGS>>> http://www.uweb.ucsb.edu/~mkirklan/salepage/garage.html

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