  We present the result of differential spectral analyses of a further four
apparently normal B-type stars. Abundance anomalies (e.g. He, C, N enrichment),
slow rotation and/or high gravities suggest that the programme stars are
evolved low-mass B-type stars. In order to trace their evolutionary status
several scenarios are discussed. Post-AGB evolution can be ruled out. PG
0229+064 and PG 1400+389 could be horizontal branch (HB) stars, while HD 76431
and SB 939 have already evolved away from the extreme HB (EHB). The low helium
abundance of HD 76431 is consistent with post-EHB evolution. The enrichment in
helium, carbon and nitrogen of the remaining stars can be explained either by
deep mixing of nuclearly processed material to the surface or by diffusion
processes modified by magnetic fields and/or stellar winds. A kinematic study
of their galactic orbits indicates that the stars belong to an old disk
population.
