Locomotive superintendents Bazin and Harty in 1929 and 1934 introduced fifteen locomotives of the 700 (J15a)and 710 (J15b) classes which were in some respects direct developments of the 101 class.
In 1929 and 1934, locomotive supervisors Bazin and Harty introduced fifteen locomotives of the J15a and J15b series, which were based on the 101 class.