Oméga ads for 33.3 chronographs ?

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I am looking for oméga ads showing 33.3 cals. I’ve Ben looking all over internet but can’t find anything. Is anyone have a clue where to find something to see online or maybe to buy ?
Cheers
 
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That’s very early stuff so it’s going to be tricky for sure, I’ve not personally seen anything like that before.

I wonder if the 33.3 might end up being reanimated by omega too one day, stranger things have happened
 
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OM33p3AD.jpg