JQF wagons were built new or recoded from JQX_ vehicles.
JQF 401 - 410 were originally JQX wagons built 1974 and recoded to JQF 10/1977. JQF 411 - 420 were built at Ballarat as JQX, moved to Newport Workshops for modifications and entered service with the JQF code during Feb/March of 1977.
In the 1979 recoding, the wagons were reclassified to VHQY.