BACHMANN > Freight Stock > OCA 31t Drop Sided Opens
Four hundred steel opens were built by BR between 1981-1982.
| Ref No | Year | Wagon/Livery | Running No |
| 377-550 | 2009 | 31 ton OCA Open - Civil Engineers Grey/Yellow | 112115 |
| 377-550A | 2010 | 31 ton OCA Open - Civil Engineers Grey/Yellow | 112092 |
| 377-550B | 2012 | 31 ton OCA Open - Civil Engineers Grey/Yellow | 112309 |
| 377-551 | 2009 | 31 ton OCA Open - Railfreight Red | 112342 |
| 377-551A | 2010 | 31 ton OCA Open - Railfreight Red | 112391 |
| 377-551B | 2017 | 31 ton OCA Open - Railfreight Red | 112016 |
| 377-552 | 2009 | 31 ton OCA Open - EWS Maroon | 112256 |
| 377-552A | 2010 | 31 ton OCA Open - EWS Maroon | 112173 |
| 377-552B | 2014 | 31 ton OCA Open - EWS Maroon | 112260 |