7853 - Crossing, Grey 4.5V
The grey era came with a great number of track options and accessories. Most were released in 1980, including this set 7853.
This set contains a single rail crossing for push-along and 4.5V trains and comes with 4 sleeper plates. A similar crossing for 12V trains is available as set 7857. This set was available from 1980 but was retired early in 1984, the only of the track sets to suffer such faith, presumably because most push-along and 4.5V track layouts were upgraded to 12V before being expanded with a rail crossing.