Kinematic parameters: (a) Toomre diagram of sample data with lines that show constant values of the total space velocity (v_tot = (U_LSR + V_LSR + W_LSR)^1/2)) at 50 and 100 km s⁻¹; (b) histogram of distances of sample stars; (c) distribution of sample stars in z_max vs. R_mean plane, where the two vertical dashed lines delimit the solar neighbourhood 7 <  R_gc <  9 kpc and red circles are current positions (|z| vs. R) for comparison; (d) kinematical thick-to-thin disc probability ratios (TD/D) vs. age for the sample stars, where the upper and lower lines mark TD/D = 2.0 and TD/D = 0.5, respectively.