results of pressure test, authenticity, concern?

[davidd]

took advice of forum members and had mayors inspect my preowned gmt, yr appx 2000 mostly to authenticate. He said pressure test was fine condition excellent, but it needs svc which i knew. however, he said the pepsi bezel is not original, it was swapped from black to pepsi. The face of the gmt is blk, that's how he knew. Should I be concerned about this? he said no big deal and doesn't really hurt value, but that he wanted me to know bezel was not original. Otherwise, he said excellent watch.