| 159422 | K7776 | AMETEK AIRTECHNOLOGY GROUP LIMITED |
| 27UA1868 | U1725 | MINISTRY OF DEFENCE AIR DOMESTIC R FERENCE NUMBER USE ONLY |
| BS1806-123 | K7766 | BRITISH STANDARDS INSTITUTION |
| BSM48-123 | K7766 | BRITISH STANDARDS INSTITUTION |
| 50444-87 | K7776 | AMETEK AIRTECHNOLOGY GROUP LIMITED |
| 50444-87 | U1486 | AIRSCREW-HOWDEN LTD |