I recently purchased an old motobecane grand tourer frame for $10 which had this stronglite crank on it. It is in very good condition. no wear on the rings. The numbers 9/16/20p appear on the back of the left crank arm, under the length which is 170.
Here is a link to a pic
http://beta.propichosting.com/Album....lder=450020162
Is this crank worth anything? If it's nothing special i'll just keep it and put it on a vintage build i will do someday.