Fair estimate on this old watch

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Omega Constellation Chronometer (1962)

Question: How do I adjust the time on this watch. Right now I can pull the side nob, set hourly time
but the minut lever do not move, there are also no further setting on the side nob. However there is a tiny button or something right beside it. Also worth mentioning is that the minute lever do move, so does the second.

Thanks in advanced
Edited:
 
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Should be a button here ? Flush with the side of the case these can be very temperamental I've owed one similar with the same movement. If you hold that little button in for 5 seconds then release then hold in again it should adjust the minute hand.
 
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I'm sorry I can't give any advice about your watch, but you might consider editing the title of this thread to attract those who can give advice. Or did you also mean to ask about the value of the watch? (I can't help with that either, sorry)
 
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Its not from 1962 by the way, more like 1979-1980.