Info so-far supplied by:- Michael Wiams (Halfin)(Belgium)
The CV1499 and CV1500 are Magnetrons, and both have following specs:-
6V heater Volt., 1.25A Heater Current, 2050 Gauss Magnetic Field, 22.5A Peak Anode Current,
200Kw Peak Output Power. One can be used in place of the other. (Used in Radar equipment).

	Any other stories, or info is welcome. Is there anything different with the two? Both of the ones that I have are brand-new, (or N.O.S.), and were aquired from an aquaintance who is beginning to be of great interest to me ! (Sorry, not telling!)
	The central black metal body identifies the Cathode, which is incorporated within a clear protective shroud which also houses the control-grid. (Size indicated by a small typical valve).
	Large chromed tubes encase the large anode at the opposite end. One is a CV-1500, and the other unit is a CV-1499. The latter is indicated as being serial-number 1. Both are brand-new, and still in protective wrappings & bags. The identity of the manufacturer is at the moment undetermined.