Remote Controlled O27 Gauge Switch No. 1122 was first issued in 1952 and would replace the No. 1121. This issue bore the number 1122 and differed from the later issue in several respects. The switch motor housing has five notches and the outside curved and straight rails contained the insulated sections needed to operate the non-derailing feature. No insulating pins are used on these switches. NOTE: These switches would scrape the center fuel tank on the EMD F-3’s which Lionel began to issue for use on O27 track in 1955.

In 1953 Lionel would redisign these switches to accomodate these larger engines. These switches are marked "MODEL 1122(E)" on the galvanized bottom, and have three notches on the control housing which has been rounded at the corner that is closest to the curved section of the track. Also, the insulating sections of the tracks have been moved to the smaller inside rails and insulating pins are required to use the non-derailing feature of these swithches. These switches operated better than the previous issue and would be produced up until the end of the Post War Period in 1969.

When these switches were sold in pairs they included a remote controller, lanterns, and power and (on Model E) insulating pins.

They were also sold individually from 1955 until 1969 under the numbers 1122LH Left Hand Switch and 1122RH Right Hand Switch.