Greetings and Welcome,
This looks like a model 6394Q produced around 1964-1966. Some of them had a black stripe through the vertical markers.
The movement, I believe is a K1072. I see the Geneva seal in yours in the 7 o'clock position.
The case should be 36mm diam and 11.5mm thick.
The bezel is a "sunburst" pattern which this model had.
As far as value is concerned, there were a few sold by Antiquorum, one just a few weeks ago.
You can check their site and do a catalogue search on "Vacheron 6394Q.
search function you will find lots of discussions on this piece.
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