This is a good example of the Triang R223 suburban coach to expand on your Southern EMU all as per the photos and title. Third one (S3155S) with a minor nibble to the running board. 2 designated S3155S third S3152S.
This product would be ideal for those looking for a green suburban express train seat in the 1st or 3rd coach of the TRIANG R223 EMU, as it is specifically designed for this type of seat.