Hi and welcome. As soon as you mention "chronograph", the Pavlovian response is to go for a Speedmaster. Leaving aside the bewildering model variations and the murky waters trawled by the Speedie collectors, that would be to ignore some very nice Omega chronos from other lines such as Seamasters, De Villes, Flightmasters, Chronostops and even the Polaris line.
I suggest you do a bit of online image searching on some of the above, see what interests you, what the market is and refine your search. There is no shame in not following the herd
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