Portion of the spectrum of HD 143487 observed at 4 epochs. The wavelengths are in the laboratory reference frame. The same lines as in Figs. A.1 to A.3 are identified even though some may not be seen in the present spectra. The blend affecting the blue side of the Fe II λ 6149.2 Å line, which probably includes a contribution of the Sm II λ 6149.06 Å line in addition to an unidentified line, is deeper than the Fe doublet in the lower (more recent) two spectra than in the upper two. The increase in depth of the Cr II λ 6147.2 Å line from the top to the bottom spectrum is also quite apparent by comparison with the neighbouring Fe II λ 6147.7 Å line. These relative intensity changes in line pairs are suggestive of variations occurring over time scales of years, which is consistent with super-slow rotation.