I can’t say I’ve seen a bantam trailer with a top like this, though I’m no expert on Bantam Trailers.
“Bantam T3 Trailer WWII Serial number 9334. 1940’s Bantam T3 Trailer from world war two. It was recently sandblasted primed and painted 4 years ago. This was my grandfathers and it is very rare to find a Bantam trailer with a Top like this. I am in need of a larger cargo trailer. 12ft trailer needed and will trade. Please call 269-449-8900 or email for more information at spoon_m@hotmail.com. The following site is a forum for these trailers. Serial number is 9334. I know this is a collectors Item to the right person and I really am not looking for it to leave unless trade or this price. Thanks for checking it out.”
This is a post war civilian trailer. It is NOT WW2 vintage!