Hello,
first of all welcome here...
I'm afraid you're in the wrong sub-forum with your question, it would be better to ask the question about the binoculars.
I don't think anyone here will be able to tell you the exact date when the Conquest was made, since the numbers don't really give a concrete indication.
The most sensible thing would be to call the Zeiss service and ask about the specific production period.
I have a Conquest 10x32 and this is how I did it.
Andreas