[SoTxButler]

If you have a Butler, you will find a BRI xx-xxxx-xxx number under the driver's side front fender and on the frame rail near the most forward part of the frame rail. If you were to look through the opening on the front of the car (if you don't have screens), you could see the number. It will be on the flat part of the frame. The first 2 numbers represent the month of manufacture, the next four are the year it was built and the last 2 or 3 represent the actual number of manufacture. If there are only 8 numbers, the car was #99 or earlier and if the number has 9, it is #100 - 104.

I don't know much about the Arntz cars, but I understand that a number appears under the drivers seat.

Search this forum and you will find much discussion about the serial numbers.

Hope this helps