All normal series plates in Bangladesh are either made of hand painted sheet metal, a printed vinyl sticker on metal or a printed sheet or letters on plastic (Perspex or Plexiglass). These are the only known examples of plate manufacturer’s samples. No manufacturer has ever made plates in or for Bangladesh.
There are very many mint, unused, painted Bangladesh plates in collections. People have them made specially and then sell them to collectors. Although they are made in Bangladesh, they have never been on any vehicle and some of them have the wrong code letters for what they are supposed to be. Bangladesh has a complicated code letter system to identify what sort of vehicle it is and hence the colour the plate should be. Be very careful of mint, unused, Bangladesh plates; they may be completely wrong.