| BS4183-TABLE 2 | K7766 | BRITISH STANDARDS INSTITUTION |
| BS4183SMMCFCSL02-0X004S00048Z8 | K0851 | MINISTRY OF DEFENCE DIRECTORATE OF STANDARDIZATION STAN 1 |
| DEFSTAN53-23 | K0851 | MINISTRY OF DEFENCE DIRECTORATE OF STANDARDIZATION STAN 1 |
| BS4183SMMCFCSL02-0X004S00048Z8 | K9090 | MINISTRY OF DEFENCE |
| FEN NG 185 | U1002 | FENN NIGHT VISION LIMITED |
| XP98PB01321 | U1725 | MINISTRY OF DEFENCE AIR DOMESTIC R FERENCE NUMBER USE ONLY |