The White Truck assigned serial number starts in the 229xxx range for half-tracs. This was built as a M2. I own 232356 just a few units behind yours. Unfortunately the frame number does not allow us to derive the ordnance number which only appears on the data plate or the hood registration number which is derived from the ord number.
Where is 232339 located? i.e. State or country. I will add this to the list on g503. Are you planning a restoration?