| 41-237 | K1425 | DIDSBURY ENGINEERING CO.LIMITED |
| 41-287 | K1425 | DIDSBURY ENGINEERING CO.LIMITED |
| 43-217 | K1425 | DIDSBURY ENGINEERING CO.LIMITED |
| 44-173 | K1425 | DIDSBURY ENGINEERING CO.LIMITED |
| 453/6 | K1425 | DIDSBURY ENGINEERING CO.LIMITED |
| 54-312 | K1425 | DIDSBURY ENGINEERING CO.LIMITED |
| DEFSTAN53-67 | K0851 | MINISTRY OF DEFENCE DIRECTORATE OF STANDARDIZATION STAN 1 |
| BS2470 | K7766 | BRITISH STANDARDS INSTITUTION |