Old Dealer Codes

I have a 66 Monaco 500 I have restored and am looking for a dealer code where it was sold. I am told it was in Oklahoma, maybe even Oklahoma City. The code is 55697 as per the glove box writing when they serviced it then. I know these codes are hard to come by but if anyone has the info, it is greatly appreciated. Thanks!!106641702070_commerceproduct_7182_40_40.jpg
Author: demonhead