| 28N16599 | U1725 | MINISTRY OF DEFENCE AIR DOMESTIC R FERENCE NUMBER USE ONLY |
| 4601-27 | K1209 | CROSS MANUFACTURING COMPANY (1938) LIMITED |
| AS4601-27 | K1012 | ARMSTRONG PRECISION COMPONENTS LTD |
| AS460127 | K5974 | ROLLS-ROYCE PLC NAVAL MARINE |
| AS4601- 27 | U1653 | SOCIETY OF BRITISH AEROSPACE COMPANI LTD SBAC |
| AS4601-27 | U1653 | SOCIETY OF BRITISH AEROSPACE COMPANI LTD SBAC |
| DEFSTAN53-14 | K0851 | MINISTRY OF DEFENCE DIRECTORATE OF STANDARDIZATION STAN 1 |