Looking on the base off this model I found that the position where the first line is different. The position start in one before the stripes begins and the other starts at the same position off the stripes above it. Maybey it's already been mentioned but didn't found it. Here a pictures what I mean.
Above : before
under : same position.
Also found by the other colour bottoms.
![Image](https://i.postimg.cc/dDMTQV1W/IMG-7197.jpg)