1969 Camaro trim tag question?

[SeattleCarGuy]

Does anyone know what the "F 406" on this 1969 Camaro Trim Tag represents?

This is purportedly a '69 Z-28, but being that it is a Van Nuys built car and not a Norwood car with the X33 or X66 code, is there anyway of knowing from the trim tag or the VIN (124379L530914) if it is a real Z-28? http://www.yenko.net/ubbthreads/pics/usergals/2016/02/full-5898-39989-016.jpg

[Tracker1]

F406 - 406th body on the 6th (F) day of the week. You can't tell a Z from that tag unfortunately - it's a Los Angeles car.

[SeattleCarGuy]

Thank you!

[wundercluck]

Check and see if you can find the corner of the build sheet on top of the fuel tank.

[Jonesy]

It will be on the drivers side front corner of the tank if there is one.