It's very simple. Just look for BANDAI's trademark in the lower right corner. So far, there has been no piracy of this trademark, but you should look carefully at some pirated trademarks that are similar to BANDAI's trademark design. In addition, there is no plastic seal on the outside of BANDAI's model box, so you can open it to check the board inside, and the board also has BANDAI's trademark. You can also look at the quality of plastic parts and the description of details. There is still a big gap between pirated and original. In fact, the words on many pirated boxes are different from the original ones, which is easy to see.

the words

/review/MG/m97/m97 _ i.htm

1/144 HG also have /review/hg/h82/h82_i.htm

on the box, but some of them are 1/1 and 1/6.

Because PG's also has PREFECT GUARD written on the box, those that don't have a grade are generally HG's.