FOS (UIT151, top left) and IUE (UIT151, ROA5342, and Dk3873) spectra together with model spectra for [M/H] = −1.5 (blue) and [M/H] = +1.0 (red). The model spectra were calculated for the temperature, surface gravity, and helium abundance listed in Table 4. They were reddened by E_B − V = 0.13 and aligned to a radial velocity of +232 km s⁻¹. The model spectra were scaled to the observed flux between 2400 Å and 2500 Å in the FOS spectrum and between 1900 Å and 1950 Å in the IUE spectra. Metal-rich model spectra are clearly needed to reproduce the observed UV flux.