Firstly, thank you
@Ubik for posting that advert. I have an image of it saved somewhere but it slipped my mind. Secondly, I believe that the watch in the advert likely contains a Longines cal. 13.33Z, rather than a Valjoux movement as
@Seiji suggests, due to the location of the chronograph pusher (but I could be wrong). Below are two examples of the 13
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