[Boatanchors] identification of IF transformers needed

[CLIVE COLLINS]

good evening gentlemen
I have two IF transformers  that I would be grateful for identification please. There is on one side of the can a name Meissner stamped into the aluminum and on the opposite side appears 16-6660 3340-063  100  00
can anyone help please with an identification as to the frequency these  work at and if possible the wiring idents. there is a red, a green, a blue and a black. Thanks in advance,
Clive GW3WEQ North Wales Coast UK