From:Mike Electronic:michael.schmitt-A-us.army.mil
Subject:RE: oil can holder Date:Sun Dec 18 23:50:25 2011
Response to:16669
Bill,
Part number is 91840-56 which sorta tells you that it came on the scene about 1956. If you mount one on your bike you also (if you want to be period correct) need to be careful about which type of oil can you clamp in it, there where both the flat-top (needed a "church-key" piercing type opener) and a "cone-top" with a twist off cap, depending on the year they were available.
Mike

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what year did the oil can holder come into the picture & what was its part number?