The OBA, OCA, & SPA wagons followed the OAA wagons, to form the largest part of the air braked open wagon fleet. They have similar underframes and suspension.
There are 1600 SPA wagons, a large number of which were transferred to the engineers' fleet (ZAA - PIKE). This was also the case with the OBA & OCA, as about half the 800 OBA's and some of the OCA's were coded ZDA - BASS.
However, since being taken over by EWS, most if not all of these wagons have returned to revenue stock, although they are still used for engineering work.
The kit requires paint, transfers, adhesive, wheels and bearings to complete.
