The pictures below illustrate the three possible locations and appearances of serial numbers for these cameras.
Your camera will have its serial number in only one of the three locations shown.
General Guidelines:
Ignore any labels in the film chamber that say things like 'Des Pat 110,516' -- that's a design patent number, and not what we're looking for.
Ignore any numbers molded into the plastic under the sprocket wheels that say things like 'US PAT 2,298,107' -- that's a standard US patent number, and not what we're looking for.
On a label under the sprocket wheels. This example has serial number 13059C:
Stamped inside the camera, either rightside-up or upside-down. This example has serial number 644163:
Stamped on the bottom of the camera body. This example has serial number 1925470264:
