Location of the SMCSGS-FS 69 components compared to mass-luminosity relations for pure He stars (green line) and early MS stars (X_H = 0.6, blue line), from Gräfener et al. (2011). The position of the partially stripped primary is shown by a filled star, while the Be secondary is shown by an open star along with their respective uncertainties. For comparison, Galactic hot subdwarfs in binaries (blue triangles) and partially stripped stars (red triangles) are indicated. The stripped primary is located in the upper left corner, which is a characteristic of a star that has lost most of its envelope via mass transfer.