The Robust grade 10 started in 1914 and ended in 1924. It was indeed on the higher end of the scale. Bear in mind however, that the Robust is definitely a "utility" gun unlike the Ideal.
In 1930, the Robust prices range from 625Fr (grade 22) to 1800Frs (36ES), while the Ideal goes from 1200 (grade 2) to 15,000Frs (grade 368) !

The grade 214 was made from 1931 to 1936, so it is certainly pre war.

WC