Four stars classified as B0.7 supergiants by Walborn (1971), with their original luminosity classes. Inspection of the region around Hδ, with application of the Si IV 4116 Å/He I 4144 Å criterion, supports these classifications. However, the primary luminosity criterion Si III 4553 Å/He I 4387 Å suggests that the three bottom stars all have approximately the same luminosity. The higher luminosity of HD 194057 is also reflected in the much weaker Balmer lines and stronger O II features. The strong Si IV lines in the spectrum of BD +35°3995 likely reflect a slightly higher temperature. See Fig. 5 for the corresponding Ia standard and Fig. A.4 for a comparison of HD 190919, which was Walborn’s standard, to stars of similar spectral types.