Stealth Speedmaster Limited EditionMost limited edition Speedmaster https://www.iwuhren.de/produkt-Sammlungen/portofino/ Professional watches have an https://www.crwmontres.com/Collection/baignoire/ engraving in the left side of the case, a (mission) patch on the sub register at 9 o'clock or a bit of extra wording https://www.iwhorloges.cz/ on the dial to indicate it is a limited edition or commemorative Speedy.