 This conversion involved the upholstered seats being swapped for second-class wooden benches (with cushions); signage on the carriage sides was altered to reflect this.The carriages so treated were 4, 8 and 12 in 1940, followed by 29, 36, 38, 41, 42, 45, 64, 77, 79, 85 and 87 in 1941.In 1954 some of the cars converted away from electric stock in 1929 returned to the swing-door electric fleet.