I'm restoring an Oshawa built 1951 Chevrolet, and am trying to determine the correct bumper jack.  The car has been in my family since new, and Dad recalls it having a green base and ratchet mechanism.  Is this correct for Oshawa built cars?  Were Pontiacs the same?  Post pictures if you have them please... 

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Thank you for your help, 58 Poncho Fan... Thanks to your picture we were able to find the original jack...

Bruce pleased to be able to help you.  Bob.