[1ntCobra]

There are at least a couple of original 427 Cobras for which the serial numbers are unknown because they were intentionally obscured from the frame.

One had a street rod body put on it, but was restored into a Cobra. It got titled with the serial number of a missing car, but that missing car later appeared.

The other was thought to be a long stolen car, but it could not be proven what the serial number was. That one was eventually rebuilt and assigned a Kirkham serial number.