An X, an O, and a line of dots signify the presence of Bruno BMA, co-founder of Ghirigori Family Body Adornment Studios located in Oggiono, Italy. Going by the scars on the incision points it appears these implants have been in for a while, and they’re looking good. Heck, the incision point on the chest looks like it’s part of the implant, which may not have been intentional, but it works well with it.