ANNEX. EMPLOYMENT OF FIRMS IN THE PHILIPS GROUP ON SECRET GOVERNMENT CONTRACTS. Explanatory Note Since various items of equipment mentioned in this report are liable to be confused in discussion, a short description of these items is included for easy reference. (a) V.T. Fuzes. Eelectronic Fuzes which have rugged sub-miniature valves incorporated in their construction. CLASSIFICATION:Broadly speaking V.T. Fuzes designed before January 1946 are CONFIDENTIAL while those of improved Design are SECRET.