In 1897 two experimental wagons were built. They were a 35'-0" long bogie open wagon IB2065 and a similar length hopper wagon 2067. In 1900 they became R2065 and X2067. The hopper wagon was not very successful and so in 1904/5 it was rebuilt to match R2065 and became R2067. Because these wagons had 4 doors they were at some point early in the 20th century reclassified RX along with many other R class wagons. They were, however, the only ones to retain this classification permanently. The WAGR outline diagram for the RX class is shown below.

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In 1968 RX2067 was fitted with a well in the middle of the body 15'-6¾" long by 2'-0½" wide and reclassified RY. The outline diagram for RY2067 is shown below. RX2065 was written off in 1972 and RY2067 was written off in 1979.