Kiel diagrams for models of NGC 6910-14 (left), 16 (middle), and 27 (right). The green area is the same as in Fig. 11. Blue vertical lines correspond to the adopted T_eff limits from Table 2. For these program stars, pulsational models for only a single rotational velocity V_eq = 170 km s⁻¹ were considered. Symbols with different colours in left and right panels correspond to different l (labelled). For NGC 6910-16 (middle panel), dots represent models for which two observed frequencies, f₁ (dark blue) and f₂ (light blue), are reproduced as l = 2 modes. The red line delimits the area common to models that reproduce both these modes. For NGC 6910-27 (right panel), dots represent models for which the frequency f₁ is reproduced. For clarity, models reproducing f₂ are not shown. Instead, the area common to models reproducing both f₁ and f₂ is enclosed with a red line.